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Homophobia encompasses a range of negative attitudes and feelings toward homosexuality or people who are identified or perceived as being lesbian, gay or bisexual.    It has been defined as contempt, prejudice, aversion, hatred or antipathy, may be based on irrational fear and may also be related to religious beliefs. Negative attitudes towards transgender and transsexual people are known as transphobia.  
Homophobia is observable in critical and hostile behavior such as discrimination and violence on the basis of sexual orientations that are non-heterosexual.    Recognized types of homophobia include institutionalized homophobia, e.g. religious homophobia and state-sponsored homophobia, and internalized homophobia, experienced by people who have same-sex attractions, regardless of how they identify.  
Negative attitudes toward identifiable LGBT groups have similar yet specific names: lesbophobia is the intersection of homophobia and sexism directed against lesbians, gayphobia is the dislike or hatred of gay men, biphobia targets bisexuality and bisexual people, and transphobia targets transgender and transsexual people and gender variance or gender role nonconformity.     According to 2010 Hate Crimes Statistics released by the FBI National Press Office, 19.3 percent of hate crimes across the United States "were motivated by a sexual orientation bias."  Moreover, in a Southern Poverty Law Center 2010 Intelligence Report extrapolating data from fourteen years (1995–2008), which had complete data available at the time, of the FBI's national hate crime statistics found that LGBT people were "far more likely than any other minority group in the United States to be victimized by violent hate crime." 
Although sexual attitudes tracing back to Ancient Greece – from the 8th to 6th centuries BC to the end of antiquity (c. 600 AD) – have been termed homophobia by scholars, and it is used to describe an intolerance towards homosexuality and homosexuals that grew during the Middle Ages, especially by adherents of Islam and Christianity,  the term itself is relatively new. 
Coined by George Weinberg, a psychologist, in the 1960s,  the term homophobia is a blend of (1) the word homosexual, itself a mix of neo-classical morphemes, and (2) phobia from the Greek φόβος, phóbos, meaning "fear", "morbid fear" or "aversion".    Weinberg is credited as the first person to have used the term in speech.  The word homophobia first appeared in print in an article written for the May 23, 1969, edition of the American pornographic magazine Screw , in which the word was used to refer to heterosexual men's fear that others might think they are gay. 
Conceptualizing anti-LGBT prejudice as a social problem worthy of scholarly attention was not new. A 1969 article in Time described examples of negative attitudes toward homosexuality as "homophobia", including "a mixture of revulsion and apprehension" which some called homosexual panic .  In 1971, Kenneth Smith used homophobia as a personality profile to describe the psychological aversion to homosexuality.  Weinberg also used it this way in his 1972 book Society and the Healthy Homosexual,  published one year before the American Psychiatric Association voted to remove homosexuality from its list of mental disorders.   Weinberg's term became an important tool for gay and lesbian activists, advocates, and their allies.  He describes the concept as a medical phobia: 
[A] phobia about homosexuals.... It was a fear of homosexuals which seemed to be associated with a fear of contagion, a fear of reducing the things one fought for — home and family. It was a religious fear and it had led to great brutality as fear always does. 
In 1981, homophobia was used for the first time in The Times (of London) to report that the General Synod of the Church of England voted to refuse to condemn homosexuality. 
However, when taken literally, homophobia may be a problematic term. Professor David A. F. Haaga says that contemporary usage includes "a wide range of negative emotions, attitudes and behaviours toward homosexual people," which are characteristics that are not consistent with accepted definitions of phobias, that of "an intense, illogical, or abnormal fear of a specified thing." Five key differences are listed as distinguishing homophobia, as often used, from a true phobia. 
Homophobia manifests in different forms, and a number of different types have been postulated, among which are internalized homophobia, social homophobia, emotional homophobia, rationalized homophobia, and others.  There were also ideas to classify homophobia, racism, and sexism as an intolerant personality disorder . 
In 1992, the American Psychiatric Association, recognizing the power of the stigma against homosexuality, issued the following statement, reaffirmed by the Board of Trustees, July 2011: 
Whereas homosexuality per se implies no impairment in judgment, stability, reliability, or general social or vocational capabilities, the American Psychiatric Association (APA) calls on all international health organizations, psychiatric organizations, and individual psychiatrists in other countries to urge the repeal in their own countries of legislation that penalizes homosexual acts by consenting adults in private. Further, APA calls on these organizations and individuals to do all that is possible to decrease the stigma related to homosexuality wherever and whenever it may occur.
Some world religions contain anti-homosexual teachings, while other religions have varying degrees of ambivalence, neutrality, or incorporate teachings that regard homosexuals as third gender. Even within some religions which generally discourage homosexuality, there may also be people who view homosexuality positively, and some religious denominations bless or conduct same-sex marriages. There also exist so-called Queer religions, dedicated to serving the spiritual needs of LGBTQI persons. Queer theology seeks to provide a counterpoint to religious homophobia.  In 2015, attorney and author Roberta Kaplan stated that Kim Davis "is the clearest example of someone who wants to use a religious liberty argument to discriminate [against same-sex couples]." 
Passages commonly interpreted as condemning homosexuality or same-gender sexual relations are found in both Old and New Testaments of the Bible. Leviticus 18:22 says "Thou shalt not lie with mankind, as with womankind: it is abomination." The destruction of Sodom and Gomorrah is also commonly seen as a condemnation of homosexuality. Christians and Jews who oppose homosexuality may often cite such passages; the historical context and interpretation of which is more complicated. Scholarly debate over the interpretation of these passages has tended to focus on placing them in proper historical context, for instance pointing out that Sodom's sins are historically interpreted as being other than homosexuality,[ citation needed ] and on the translation of rare or unusual words in the passages in question. In Religion Dispatches magazine, Candace Chellew-Hodge argues that the six or so verses that are often cited to condemn LGBT people are referring instead to "abusive sex". She states that the Bible has no condemnation for "loving, committed, gay and lesbian relationships" and that Jesus was silent on the subject.  This view is opposed by a number of conservative evangelicals,  including Robert A. J. Gagnon. 
The official teaching of the Catholic Church regarding homosexuality is that same-sex behavior should not be expressed.  In the United States, a February 2012 Pew Research Center poll shows that Catholics support gay marriage by a margin of 52% to 37%.  That is a shift upwards from 2010, when 46% of Catholics favored gay marriage.  The Catechism of the Catholic Church states that, "'homosexual acts are intrinsically disordered.'...They are contrary to the natural law.... Under no circumstances can they be approved." 
In some cases, the distinction between religious homophobia and state-sponsored homophobia is not clear, a key example being territories under Islamic authority. All major Islamic sects forbid homosexuality, which is a crime under Sharia Law and treated as such in most Muslim countries. In Afghanistan, for instance, homosexuality carried the death penalty under the Taliban. After their fall, homosexuality was reduced from a capital crime to one that is punished with fines and prison sentences. The legal situation in the United Arab Emirates, however, is unclear.
In 2009, the International Lesbian and Gay Association (ILGA) published a report entitled State Sponsored Homophobia 2009,  which is based on research carried out by Daniel Ottosson at Södertörn University College, Stockholm, Sweden. This research found that of the 80 countries around the world that continue to consider homosexuality illegal:  
In 2001, Al-Muhajiroun, an international organization seeking the establishment of a global Islamic caliphate, issued a fatwa declaring that all members of The Al-Fatiha Foundation (which advances the cause of gay, lesbian, and transgender Muslims) were murtadd , or apostates, and condemning them to death. Because of the threat and because they come from conservative societies, many members of the foundation's site still prefer to be anonymous so as to protect their identities while they are continuing a tradition of secrecy. 
In some regions, gay people have been persecuted and murdered by Islamist militias,  such as Al-Nusra Front and ISIL in parts of Iraq and Syria. 
|Same-sex intercourse illegal. Penalties:|
Prison; death not enforced
Death under militias
Prison, w/ arrests or detention
Prison, not enforced
|Same-sex intercourse legal. Recognition of unions:|
Restrictions of expression
State-sponsored homophobia includes the criminalization and penalization of homosexuality, hate speech from government figures, and other forms of discrimination, violence, persecution of LGBT people. 
In medieval Europe, homosexuality was considered sodomy and it was punishable by death. Persecutions reached their height during the Medieval Inquisitions, when the sects of Cathars and Waldensians were accused of fornication and sodomy, alongside accusations of Satanism. In 1307, accusations of sodomy and homosexuality were major charges leveled during the Trial of the Knights Templar.  The theologian Thomas Aquinas was influential in linking condemnations of homosexuality with the idea of natural law, arguing that "special sins are against nature, as, for instance, those that run counter to the intercourse of male and female natural to animals, and so are peculiarly qualified as unnatural vices." 
Although bisexuality was accepted as normal human behavior in Ancient China,  homophobia became ingrained in the late Qing Dynasty and the Republic of China due to interactions with the Christian West,  and homosexual behavior was outlawed in 1740.  During the Cultural Revolution, homosexuality was treated by the government as a "social disgrace or a form of mental illness", and individuals who were homosexual widely faced persecution. Although there were no laws specifically against homosexuality, other laws were used to prosecute homosexual people and they were "charged with hooliganism or disturbing public order."  [ better source needed ]
The Soviet Union under Vladimir Lenin decriminalized homosexuality in 1922, long before many other European countries. The Soviet Communist Party effectively legalized no-fault divorce, abortion and homosexuality, when they abolished all the old Tsarist laws and the initial Soviet criminal code kept these liberal sexual policies in place.  Lenin's emancipation was reversed a decade later by Joseph Stalin and homosexuality remained illegal under Article 121 until the Yeltsin era.
In Nazi Germany, gay men were persecuted and approximately five to fifteen thousand were imprisoned in Nazi concentration camps. 
Homosexuality is illegal in 74 countries.  The North Korean government condemns Western gay culture as a vice caused by the decadence of a capitalist society, and it denounces it as promoting consumerism, classism, and promiscuity.  In North Korea, "violating the rules of collective socialist life" can be punished with up to two years' imprisonment.  However, according to the North Korean government, "As a country that has embraced science and rationalism, the DPRK recognizes that many individuals are born with homosexuality as a genetic trait and treats them with due respect. Homosexuals in the DPRK have never been subject to repression, as in many capitalist regimes around the world."
Robert Mugabe, the former president of Zimbabwe, waged a violent campaign against LGBT people, arguing that before colonisation, Zimbabweans did not engage in homosexual acts.  His first major public condemnation of homosexuality was in August 1995, during the Zimbabwe International Book Fair.  He told an audience: "If you see people parading themselves as lesbians and gays, arrest them and hand them over to the police!"  In September 1995, Zimbabwe's parliament introduced legislation banning homosexual acts.  In 1997, a court found Canaan Banana, Mugabe's predecessor and the first President of Zimbabwe, guilty of 11 counts of sodomy and indecent assault.  
In Poland local towns, cities,   and Voivodeship sejmiks  have declared their respective regions as LGBT ideology free zone with the encouragement of the ruling Law and Justice party. 
Since 2006, under Vladimir Putin, regions in Russia have enacted varying laws restricting the distribution of materials promoting LGBT relationships to minors; in June 2013, a federal law criminalizing the distribution of materials among minors in support of non-traditional sexual relationships was enacted as an amendment to an existing child protection law. The law has resulted in the numerous arrests of Russian LGBT citizens. 
Internalized homophobia refers to negative stereotypes, beliefs, stigma, and prejudice about homosexuality and LGBT people that a person with same-sex attraction turns inward on themselves, whether or not they identify as LGBT.    The degree to which someone is affected by these ideas depends on how much and which ideas they have consciously and subconsciously internalized.  These negative beliefs can be mitigated with education, life experience and therapy,   especially with gay-friendly psychotherapy/analysis.  Internalized homophobia also applies to conscious or unconscious behaviors which a person feels the need to promote or conform to cultural expectations of heteronormativity or heterosexism. This can include extreme repression and denial coupled with forced outward displays of heteronormative behavior for the purpose of appearing or attempting to feel "normal" or "accepted". Other expressions of internalized homophobia can also be subtle. Some less overt behaviors may include making assumptions about the gender of a person's romantic partner, or about gender roles.  Some researchers also apply this label to LGBT people who support "compromise" policies, such as those that find civil unions acceptable in place of same-sex marriage. 
Some studies have shown that people who are homophobic are more likely to have repressed homosexual desires.  In 1996, a controlled study of 64 heterosexual men (half said they were homophobic by experience, with self-reported orientation) at the University of Georgia found that men who were found to be homophobic (as measured by the Index of Homophobia)  were considerably more likely to experience more erectile responses when exposed to homoerotic images than non-homophobic men.  Weinstein et al. 2012  arrived at similar results when researchers found that students who came from "the most rigid anti-gay homes" were most likely to reveal repressed homosexual attraction.  The researchers said that this explained why some religious leaders who denounce homosexuality are later revealed to have secret homosexual relations.  They noted that "these people are at war with themselves and are turning this internal conflict outward."  A 2016 eye-tracking study showed that heterosexual men with high negative impulse reactions toward homosexuals gazed for longer periods at homosexual imagery than other heterosexual men.  According to Cheval et al. (2016), these findings reinforce the necessity to consider that homophobia might reflect concerns about sexuality in general and not homosexuality in particular.  In contrast, Jesse Marczyk argued in Psychology Today that homophobia is not repressed homosexuality. 
Researcher Iain R. Williamson, in his 1998 paper "Internalized Homophobia and Health Issues Affecting Lesbians and Gay Men" finds the term homophobia to be "highly problematic" but for reasons of continuity and consistency with the majority of other publications on the issue retains its use rather than using more accurate but obscure terminology.  The phrase internalized sexual stigma is sometimes used in place to represent internalized homophobia.  An internalized stigma arises when a person believes negative stereotypes about themselves, regardless of where the stereotypes come from. It can also refer to many stereotypes beyond sexuality and gender roles. Internalized homophobia can cause discomfort with and disapproval of one's own sexual orientation. Ego-dystonic sexual orientation or egodystonic homophobia, for instance, is a condition characterized by having a sexual orientation or an attraction that is at odds with one's idealized self-image, causing anxiety and a desire to change one's orientation or become more comfortable with one's sexual orientation. Such a situation may cause extreme repression of homosexual desires.  In other cases, a conscious internal struggle may occur for some time, often pitting deeply held religious or social beliefs against strong sexual and emotional desires. This discordance can cause clinical depression, and a higher rate of suicide among LGBT youth (up to 30 percent of non-heterosexual youth attempt suicide) has been attributed to this phenomenon.  Psychotherapy, such as gay affirmative psychotherapy, and participation in a sexual-minority affirming group can help resolve the internal conflicts, such as between religious beliefs and sexual identity.  Even informal therapies that address understanding and accepting of non-heterosexual orientations can prove effective.  Many diagnostic "Internalized Homophobia Scales" can be used to measure a person's discomfort with their sexuality and some can be used by people regardless of gender or sexual orientation. Critics of the scales note that they presume a discomfort with non-heterosexuality which in itself enforces heternormativity.  
The fear of being identified as gay can be considered as a form of social homophobia. Theorists including Calvin Thomas and Judith Butler have suggested that homophobia can be rooted in an individual's fear of being identified as gay. Homophobia in men is correlated with insecurity about masculinity.   For this reason, homophobia is allegedly rampant in sports, and in the subculture of its supporters that is considered stereotypically male, such as association football and rugby. 
These theorists have argued that a person who expresses homophobic thoughts and feelings does so not only to communicate their beliefs about the class of gay people, but also to distance themselves from this class and its social status. Thus, by distancing themselves from gay people, they are reaffirming their role as a heterosexual in a heteronormative culture, thereby attempting to prevent themselves from being labeled and treated as a gay person. This interpretation alludes to the idea that a person may posit violent opposition to "the Other" as a means of establishing their own identity as part of the majority and thus gaining social validation.
Nancy J. Chodorow states that homophobia can be viewed as a method of protection of male masculinity. 
Various psychoanalytic theories explain homophobia as a threat to an individual's own same-sex impulses, whether those impulses are imminent or merely hypothetical. This threat causes repression, denial or reaction formation. 
Disapproval of homosexuality and of gay people is not evenly distributed throughout society, but is more or less pronounced according to age, ethnicity, geographic location, race, sex, social class, education, partisan identification and religious status.  According to UK HIV/AIDS charity AVERT, religious views, lack of homosexual feelings or experiences, and lack of interaction with gay people are strongly associated with such views. 
The anxiety of heterosexual individuals (particularly adolescents whose construction of heterosexual masculinity is based in part on not being seen as gay) that others may identify them as gay   has also been identified by Michael Kimmel as an example of homophobia.  The taunting of boys seen as eccentric (and who are not usually gay) is said to be endemic in rural and suburban American schools, and has been associated with risk-taking behavior and outbursts of violence (such as a spate of school shootings) by boys seeking revenge or trying to assert their masculinity.  Homophobic bullying is also very common in schools in the United Kingdom.  At least 445 LGBT Brazilians were either murdered or committed suicide in 2017. 
In some cases, the works of authors who merely have the word "Gay" in their name (Gay Talese, Peter Gay) or works about things also contain the name ( Enola Gay ) have been destroyed because of a perceived pro-homosexual bias. 
In the United States, attitudes about people who are homosexual may vary on the basis of partisan identification. Republicans are far more likely than Democrats to have negative attitudes about people who are gay and lesbian, according to surveys conducted by the National Election Studies from 2000 through 2004. This disparity is shown in the graph on the right, which is from a book published in 2008 by Joseph Fried. The tendency of Republicans to view gay and lesbian people negatively could be based on homophobia, religious beliefs, or conservatism with respect to the traditional family. 
Homophobia also varies by region; statistics show that the Southern United States has more reports of anti-gay prejudice than any other region in the US. 
In a 1998 address, author, activist, and civil rights leader Coretta Scott King stated that "Homophobia is like racism and anti-Semitism and other forms of bigotry in that it seeks to dehumanize a large group of people, to deny their humanity, their dignity and personhood."  One study of white adolescent males conducted at the University of Cincinnati by Janet Baker[ which? ] has been used to argue that negative feelings towards gay people are also associated with other discriminatory behaviors.  According to the study, hatred of gay people, antisemitism, and racism are "likely companions".  Baker hypothesized "maybe it's a matter of power and looking down on all you think are at the bottom."  A study performed in 2007 in the UK for the charity Stonewall reports that up to 90 percent of the population support anti-discrimination laws protecting gay and lesbian people. 
There are at least two studies which indicate that homophobia may have a negative economic impact for the countries where it is widespread. In these countries there is a flight of their LGBT populations—with the consequent loss of talent—as well as an avoidance of LGBT tourism, that leaves the pink money in LGBT-friendlier countries. As an example, LGBT tourists contribute 6,800 million dollars every year to the Spanish economy. 
As soon as 2005, an editorial from the New York Times related the politics of don't ask, don't tell in the US Army with the lack of translators from Arabic, and with the delay in the translation of Arabic documents, calculated to be about 120,000 hours at the time. Since 1998, with the introduction of the new policy, about 20 Arabic translators had been expelled from the Army, specifically during the years the US was involved in wars in Iraq and Afghanistan. 
M. V. Lee Badgett, an economist at the University of Massachusetts Amherst, presented in March 2014 in a meeting of the World Bank the results of a study about the economical impact of homophobia in India. Only in health expenses, caused by depression, suicide, and HIV treatment, India would have spent additional 23,100 million dollars due to homophobia. On top, there would be costs caused by violence, workplace loss, rejection of the family, and bullying at school, that would result in a lower education level, lower productivity, lower wages, worse health, and a lower life expectancy among the LGBT population.  In total, she estimated for 2014 in India a loss of up to 30,800 million dollars, or 1.7% of the Indian GDP.   
The LGBT activist Adebisi Alimi, in a preliminary estimation, has calculated that the economic loss due to homophobia in Nigeria is about 1% of its GDP. Taking into account that in 2015 homosexuality is still illegal in 36 of the 54 African countries, the money loss due to homophobia in the continent could amount to hundreds of millions of dollars every year. 
Another study regarding socioecological measurement of homophobia and its public health impact for 158 countries was conducted in 2018. It found that the prejudice against gay people has a worldwide economic cost of $119.1 billion. Economical loss in Asia was 88.29 billion dollars due to homophobia, and in Latin America & the Caribbean it was 8.04 billion dollars. Economical cost in East Asia and Middle Asia was 10.85 billion dollars. Economical cost in Middle East and North Africa was 16.92 billion dollars. The researcher suggested that a 1% decrease in the level of homophobia is associated with a 10% increase in the gross domestic product per capita. 
A newer study from March 2018 done by The Williams Institute (UCLA School of Law) concludes that there is a positive correlation between LGBT inclusion and GDP per capita. According to this study, the legal rights of LGBT people have a bigger influence than the degree of acceptance in the society, but both effects reinforce each other.  A one-point increase in their LGBT Global Acceptance Index (GAI) showed an increase of $1,506 in GDP per capita; and one additional legal right was correlated with an increase of $1,694 in GDP per capita. 
Most international human rights organizations, such as Human Rights Watch and Amnesty International, condemn laws that make homosexual relations between consenting adults a crime. Since 1994, the United Nations Human Rights Committee has also ruled that such laws violated the right to privacy guaranteed in the Universal Declaration of Human Rights and the International Covenant on Civil and Political Rights. In 2008, the Roman Catholic Church issued a statement which "urges States to do away with criminal penalties against [homosexual persons]." The statement, however, was addressed to reject a resolution by the UN Assembly that would have precisely called for an end of penalties against homosexuals in the world.  In March 2010, the Committee of Ministers of the Council of Europe adopted a recommendation on measures to combat discrimination on grounds of sexual orientation or gender identity, described by CoE Secretary General as the first legal instrument in the world dealing specifically with one of the most long-lasting and difficult forms of discrimination to combat. 
To combat homophobia, the LGBT community uses events such as gay pride parades and political activism (See gay pride). In August 2019, the Pride in London community took a different initiative to "show solidarity with the LGBT+ community" and colored the crossings in rainbow colors for the annual parades. The first permanent crossings have been put on roads in Lambeth. Others were painted in Royal Borough of Greenwich. 
One form of organized resistance to homophobia is the International Day Against Homophobia (or IDAHO),  first celebrated May 17, 2005, in related activities in more than 40 countries.  The four largest countries of Latin America (Argentina, Brazil, Mexico and Colombia) developed mass media campaigns against homophobia since 2002. 
In addition to public expression, legislation has been designed, controversially, to oppose homophobia, as in hate speech, hate crime, and laws against discrimination on the basis of sexual orientation. Successful preventative strategies against homophobic prejudice and bullying in schools have included teaching pupils about historical figures who were gay, or who suffered discrimination because of their sexuality. 
Some argue that anti-LGBT prejudice is immoral and goes above and beyond the effects on that class of people. Warren J. Blumenfeld argues that this emotion gains a dimension beyond itself, as a tool for extreme right-wing conservatives and fundamentalist religious groups and as a restricting factor on gender-relations as to the weight associated with performing each role accordingly.  Furthermore, Blumenfeld in particular stated:
"Anti-gay bias causes young people to engage in sexual behavior earlier in order to prove that they are straight. Anti-gay bias contributed significantly to the spread of the AIDS epidemic. Anti-gay bias prevents the ability of schools to create effective honest sexual education programs that would save children's lives and prevent STDs (sexually transmitted diseases)." 
Drawing upon research by Arizona State University Professor Elizabeth Segal, University of Memphis professors Robin Lennon-Dearing and Elena Delavega argued in a 2016 article published in the Journal of Homosexuality that homophobia could be reduced through exposure (learning about LGBT experiences), explanation (understanding the different challenges faced by LGBT people), and experience (putting themselves in situations experienced by LGBT people by working alongside LGBT co-workers or volunteering at an LGBT community center). 
Researchers have proposed alternative terms to describe prejudice and discrimination against LGBT people. Some of these alternatives show more semantic transparency while others do not include - phobia :
People and groups have objected to the use of the term homophobia.   
Use of homophobia, homophobic, and homophobe has been criticized as pejorative against LGBT rights opponents. Behavioral scientists William O'Donohue and Christine Caselles stated in 1993 that "as [homophobia] is usually used, [it] makes an illegitimately pejorative evaluation of certain open and debatable value positions, much like the former disease construct of homosexuality" itself, arguing that the term may be used as an ad hominem argument against those who advocate values or positions of which the user does not approve. 
In 2012 the Associated Press Stylebook was revised to advise against using non-clinical words with the suffix -phobia, including homophobia, in "political and social contexts". AP Deputy Standards Editor Dave Minthorn said the word homophobia suggests a severe mental disorder, and that it could be substituted with "anti-gay" or similar phrasing.   The AP's decision was criticized in some media outlets, especially those in the LGBT area,  who argued that homophobia did not necessarily have to be interpreted in a strict clinical sense.  
The term heterophobia is sometimes used to describe reverse discrimination or negative attitudes towards heterosexual people and opposite-sex relationships based on their sexual orientation.  The scientific use of heterophobia in sexology is restricted to few researchers, notably those who question Alfred Kinsey's sex research.   To date, the existence or extent of heterophobia is mostly unrecognized by sexologists.  Beyond sexology, there is no consensus as to the meaning of the term because it is also used to mean "fear of the opposite", such as in Pierre-André Taguieff's The Force of Prejudice: On Racism and Its Doubles (2001).
Referring to the debate on both meaning and use, SUNY lecturer Raymond J. Noonan, in his 1999 presentation to The Society for the Scientific Study of Sexuality (SSSS) and the American Association of Sex Educators, Counselors, and Therapists (AASECT) Conference,  states:
The term heterophobia is confusing for some people for several reasons. On the one hand, some look at it as just another of the many me-too social constructions that have arisen in the pseudoscience of victimology in recent decades. (Many of us recall John Money's 1995 criticism of the ascendancy of victimology and its negative impact on sexual science.) Others look at the parallelism between heterophobia and homophobia, and suggest that the former trivializes the latter... For others, it is merely a curiosity or parallel-construction word game. But for others still, it is part of both the recognition and politicization of heterosexuals' cultural interests in contrast to those of gays—particularly where those interests are perceived to clash.
Stephen M. White and Louis R. Franzini introduced the related term heteronegativism to refer to the considerable range of negative feelings that some gay individuals may hold and express toward heterosexuals. This term is preferred to heterophobia because it does not imply extreme or irrational fear.  The Merriam-Webster dictionary of the English language defines heterophobia as "irrational fear of, aversion to, or discrimination against heterosexual people". 
Heteronormativity is the concept that heterosexuality is the preferred or normal mode of sexual orientation. It assumes the gender binary and that sexual and marital relations are most fitting between people of opposite sex. A heteronormative view, therefore, involves alignment of biological sex, sexuality, gender identity and gender roles. Heteronormativity is often linked to heterosexism and homophobia. The effects of societal heteronormativity on lesbian, gay and bisexual individuals can be examined as heterosexual or "straight" privilege.
Biphobia is aversion toward bisexuality or people who are identified or perceived as being bisexual. Similarly to homophobia, it refers to hatred and prejudice specifically against those identified or perceived as being in the bisexual community. It can take the form of denial that bisexuality is a genuine sexual orientation, or of negative stereotypes about people who are bisexual. Other forms of biphobia include bisexual erasure.
Heterosexism is a system of attitudes, bias, and discrimination in favor of female–male sexuality and relationships. According to Elizabeth Cramer, it can include the belief that all people are or should be heterosexual and that heterosexual relationships are the only norm and therefore superior.
The field of psychology has extensively studied homosexuality as a human sexual orientation. The American Psychiatric Association listed homosexuality in the Diagnostic and Statistical Manual of Mental Disorders (DSM) in 1952, but that classification came under scrutiny in research funded by the National Institute of Mental Health. That research and subsequent studies consistently failed to produce any empirical or scientific basis for regarding homosexuality as anything other than a natural and normal sexual orientation that is a healthy and positive expression of human sexuality. As a result of this scientific research, the American Psychiatric Association declassified homosexuality as a mental disorder in 1973. Upon a thorough review of the scientific data, the American Psychological Association followed in 1975 and also called on all mental health professionals to take the lead in "removing the stigma of mental illness that has long been associated" with homosexuality. In 1993, the National Association of Social Workers adopted the same position as the American Psychiatric Association and the American Psychological Association, in recognition of scientific evidence. The World Health Organization, which listed homosexuality in the ICD-9 in 1977, removed homosexuality from the ICD-10 which was endorsed by the 43rd World Health Assembly on 17 May 1990.
Non-heterosexual is a word for a sexual orientation or sexual identity that is not heterosexual. The term helps define the "concept of what is the norm and how a particular group is different from that norm". Non-heterosexual is used in feminist and gender studies fields as well as general academic literature to help differentiate between sexual identities chosen, prescribed and simply assumed, with varying understanding of implications of those sexual identities. The term is similar to queer, though less politically charged and more clinical; queer generally refers to being non-normative and non-heterosexual. Some view the term as being contentious and pejorative as it "labels people against the perceived norm of heterosexuality, thus reinforcing heteronormativity". Still others say non-heterosexual is the only term useful to maintaining coherence in research and suggest it "highlights a shortcoming in our language around sexual identity"; for instance, its use can enable bisexual erasure.
Stereotypes about lesbian, gay, bisexual and transgender (LGBT) people are based on their sexual orientations, gender identities, or gender expressions. Stereotypical perceptions may be acquired through interactions with parents, teachers, peers and mass media, or, more generally, through a lack of firsthand familiarity, resulting in an increased reliance on generalizations.
Lesbian, gay, bisexual, and transgender (LGBTQIA+) rights in Kazakhstan are considered the most developed in Central Asia. However, like in other Post-Soviet countries, LGBT people face legal challenges not experienced by non-LGBTQIA+ citizens. Both male and female same-sex sexual activity are legal in Kazakhstan, but same-sex couples and households headed by same-sex couples are not eligible for the same legal protections available to opposite-sex married couples.
Sexual orientation discrimination is discrimination based on sexual orientation and/or sexual behaviour.
Lesbian, gay, bisexual, transgender, and other non-cisgender or non-heterosexual (LGBT) persons in El Salvador face some legal and social challenges not experienced by non-LGBT residents. Same-sex sexual activity of all genders are legal in El Salvador, but same-sex couples and households headed by same-sex couples are not eligible for the same legal protections available to opposite-sex married couples.
Various topics in medicine relate to lesbian, gay, bisexual, and transgender people. According to the US Gay and Lesbian Medical Association (GLMA), besides HIV/AIDS, issues related to LGBT health include breast and cervical cancer, hepatitis, mental health, substance use disorders, alcohol use, tobacco use, depression, access to care for transgender persons, issues surrounding marriage and family recognition, conversion therapy, refusal clause legislation, and laws that are intended to "immunize health care professionals from liability for discriminating against persons of whom they disapprove."
Homosexuality, as a phenomenon and as a behavior, has existed throughout all eras in human societies.
The Riddle scale was a psychometric scale that measured the degree to which a person is or is not homophobic. The scale was frequently used in tolerance education about anti-discriminatory attitudes regarding sexual orientation. It is named after its creator, psychologist Dorothy Riddle.
Sexual stigma is a form of social stigma against people who are perceived to be non-heterosexual because of their beliefs, identities or behaviors. Privileged individuals, or the majority group members, are the main contributors of placing sexual stigmas on individuals and their minority group. It is those who hold a higher status that determine within a society which groups are deemed unworthy of a higher status by labeling their specific actions or beliefs. Stereotypes are then produced which further the debilitating effects of the label(s) placed on group members with non-heterosexual beliefs or practices.
Historically speaking, lesbian, gay, bisexual, and transgender (LGBT) people have not been given equal treatment and rights by both governmental actions and society's general opinion. Much of the intolerance for LGBT individuals come from lack of education around the LGBT community, and contributes to the stigma that results in same-sex marriage being legal in few countries (31) and persistence of discrimination, such as in the workplace.
Discrimination against gay men, sometimes called gayphobia, is a form of homophobic prejudice, hatred, or bias specifically directed toward gay men, male homosexuality, or men who are perceived to be gay. This discrimination is closely related to femmephobia, which is the dislike of, or hostility toward, individuals who present as feminine, including gay and effeminate men. Discrimination against gay men can result from religion, prejudicial reactions to one's feminine mannerisms, styles of clothing, and even vocal register. Within the LGBT-community, internalized issues around meeting social expectations of masculinity have been found among gay, bisexual, and transgender men.
The following outline offers an overview and guide to LGBT topics.
Homophobia in ethnic minority communities is any negative prejudice or form of discrimination in ethnic minority communities worldwide towards people who identify as–or are perceived as being–lesbian, gay, bisexual or transgender (LGBT), known as homophobia. This may be expressed as antipathy, contempt, prejudice, aversion, hatred, irrational fear, and is sometimes related to religious beliefs. While religion can have a positive function in many LGB Black and Minority Ethnic (BME) communities, it can also play a role in supporting homophobia.
LGBT psychology is a field of psychology of surrounding the lives of LGBT individuals, in the particular the diverse range of psychological perspectives and experiences of these individuals. It covers different aspects such as identity development including the coming out process, parenting and family practices and support for LGBT individuals, as well as issues of prejudice and discrimination involving the LGBT community.
Sexual assault of LGBT people, also known as sexual and gender minorities (SGM), is a form of violence that occurs within the LGBT community. While sexual assault and other forms of interpersonal violence can occur in all forms of relationships, it is found that sexual minorities experience it at rates that are equal to or higher than their heterosexual counterparts. There is a lack of research on this specific problem for the LGBT population as a whole, but there does exist a substantial amount of research on college LGBT students who have experienced sexual assault and sexual harassment.
Because of the complicated interplay among gender identity, gender roles, and sexual identity, transgender people are often assumed to be lesbian or gay (See Overview: Sexism, Heterosexism, and Transgender Oppression). ... Because transgender identity challenges a binary conception of sexuality and gender, educators must clarify their own understanding of these concepts. ... Facilitators must be able to help participants understand the connections among sexism, heterosexism, and transgender oppression and the ways in which gender roles are maintained, in part, through homophobia.
In a culture of homophobia (an irrational fear of gay, lesbian, bisexual, and transgender [GLBT] people), GLBT people often face a heightened risk of violence specific to their sexual identities.
Homophobia is an individual's irrational fear or hate of homosexual people. This may include bisexual or transgender persons, but sometimes the more distinct terms of biphobia or transphobia, respectively, are used.
Fear or hatred of homosexuals and homosexuality.
Transgender people subjected to violence, in a range of cultural contexts, frequently report that transphobic violence is expressed in homophobic terms. The tendency to translate violence against a trans person to homophobia reflects the role of gender in attribution of homosexuality as well as the fact that hostility connected to homosexuality is often associated with the perpetrators' prejudices about particular gender practices and their visibility.
Let us recognize where the problem lies – in the dislike and distaste felt by many heterosexuals for homosexuals, a problem we have come to call homophobia.and Gledhill, Ruth (August 7, 2008). "New light on Archbishop of Canterbury's view on homosexuality". The Times. London.
Human Rights Watch calls on Iran to end juvenile executions, after claims that two boys were executed for being gay.
Homan, and organization for lesbian, gay, bisexual and transgender Iranians in exile, estimates that more than 4,000 gay Iranians have been executed in the country since the Islamic revolution of 1979.
Saudi executions are not systematically reported, and officials deny that the death penalty is applied for same-sex activity alone.
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