Romantic orientation, also called affectional orientation, is the classification of the sex or gender which a person experiences romantic attraction towards or is likely to have a romantic relationship with. The term is used alongside the term "sexual orientation", as well as being used alternatively to it, based upon the perspective that sexual attraction is only a single component of a larger concept.
Heterosexuality is romantic attraction, sexual attraction or sexual behavior between people of the opposite sex or gender. As a sexual orientation, heterosexuality is "an enduring pattern of emotional, romantic, and/or sexual attractions" to people of the opposite sex. It "also refers to a person's sense of identity based on those attractions, related behaviors, and membership in a community of others who share those attractions." Someone who is heterosexual is commonly referred to as straight.
Sexual orientation is an enduring personal pattern of romantic attraction or sexual attraction to persons of the opposite sex or gender, the same sex or gender, or to both sexes or more than one gender. Patterns are generally categorized under heterosexuality, homosexuality, and bisexuality, while asexuality is sometimes identified as the fourth category.
The Kinsey scale, also called the Heterosexual–Homosexual Rating Scale, is used in research to describe a person's sexual orientation based on one's experience or response at a given time. The scale typically ranges from 0, meaning exclusively heterosexual, to a 6, meaning exclusively homosexual. In both the male and female volumes of the Kinsey Reports, an additional grade, listed as "X", indicated "no socio-sexual contacts or reactions" (asexuality). The reports were first published in Sexual Behavior in the Human Male (1948) by Alfred Kinsey, Wardell Pomeroy, and others, and were also prominent in the complementary work Sexual Behavior in the Human Female (1953).
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.
The field of psychology has extensively studied homosexuality as a human sexual orientation. The American Psychiatric Association listed homosexuality in the DSM-I in 1952 as a "sociopathic personality disturbance," 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 removed homosexuality from the DSM-II 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.
Sexual identity refers to one's self-perception in terms of romantic or sexual attraction towards others, though not mutually exclusive, and can be different from romantic identity. Sexual identity may also refer to sexual orientation identity, which is when people identify or dis-identify with a sexual orientation or choose not to identify with a sexual orientation. Sexual identity and sexual behavior are closely related to sexual orientation, but they are distinguished, with identity referring to an individual's conception of themselves, behavior referring to actual sexual acts performed by the individual, and sexual orientation referring to romantic or sexual attractions toward persons of the opposite sex or gender, the same sex or gender, to both sexes or more than one gender, or to no one.
Obtaining precise numbers on the demographics of sexual orientation is difficult for a variety of reasons, including the nature of the research questions. Most of the studies on sexual orientation rely on self-reported data, which may pose challenges to researchers because of the subject matter's sensitivity. The studies tend to pose two sets of questions. One set examines self-report data of same-sex sexual experiences and attractions, while the other set examines self-report data of personal identification as homosexual or bisexual. Overall, fewer research subjects identify as homosexual or bisexual than report having had sexual experiences or attraction to a person of the same sex. Survey type, questions and survey setting may affect the respondents' answers.
Fred "Fritz" Klein was an Austrian-born American psychiatrist and sex researcher who studied bisexuals and their relationships. He was an author and editor, as well as the developer of the Klein Sexual Orientation Grid, a scale that measures an individual's sexual orientation. Klein believed that sexual orientation could change over the course of a lifetime and that researchers underestimated the number of men that had sexual interactions with both sexes. Fritz Klein founded the American Institute of Bisexuality in 1998, which is continuing his work by sponsoring bisexual-inclusive sex research, educating the general public on sexuality, and promoting bisexual culture and community.
Androphilia and gynephilia are terms used in behavioral science to describe sexual orientation, as an alternative to a gender binary homosexual and heterosexual conceptualization. Androphilia describes sexual attraction to men and/or masculinity; gynephilia describes the sexual attraction to women and/or femininity. Ambiphilia describes the combination of both androphilia and gynephilia in a given individual, or bisexuality.
Homosexuality is sexual attraction, romantic attraction, or sexual behavior between members of the same sex or gender. As a sexual orientation, homosexuality is "an enduring pattern of emotional, romantic, and/or sexual attractions" exclusively to people of the same sex or gender. It "also refers to a person's sense of identity based on those attractions, related behaviors, and membership in a community of others who share those attractions."
The questioning of one's sexual orientation, sexual identity, gender, or all three is a process of exploration by people who may be unsure, still exploring, or concerned about applying a social label to themselves for various reasons. The letter "Q" is sometimes added to the end of the acronym LGBT ; the "Q" can refer to either queer or questioning.
Bisexuality is a romantic or sexual attraction or behavior toward both males and females, to more than one gender, or to both people of the same gender and different genders. It may also be defined to include romantic or sexual attraction to people regardless of their sex or gender identity, which is also known as pansexuality.
Sexual fluidity is one or more changes in sexuality or sexual identity. Sexual orientation is stable for the vast majority of people, but some research indicates that some people may experience change in their sexual orientation, and this is slightly more likely for women than for men. There is no scientific evidence that sexual orientation can be changed through psychotherapy. Sexual identity can change throughout an individual's life, and does not have to align with biological sex, sexual behavior, or actual sexual orientation.
The demographics of sexual orientation and gender identity in the United States have been studied in the social sciences in recent decades. A 2022 Gallup poll concluded that 7.1% of adult Americans identified as LGBT. A different survey in 2016, from the Williams Institute, estimated that 0.6% of U.S. adults identify as transgender. As of 2022, estimates for the total percentage of U.S. adults that are transgender or nonbinary range from 0.5% to 1.6%. Additionally, a Pew Research survey from 2022 found that approximately 5% of young adults in the U.S. say their gender is different from their sex assigned at birth.
James Donald "Jim" Weinrich is an American sex researcher and psychobiologist. Much of his work examines the relationship of biology and sexual orientation. He won the Outstanding Contributions to Sexual Science Award at the 2011 Society for the Scientific Study of Sexuality (SSSS) Western Region annual meeting. He has also won the SSSS Hugo Beigel Award for the best paper published in The Journal of Sex Research. Weinrich served as the editor-in-chief of the Journal of Bisexuality from 2011 to 2014. He has also served on the editorial boards for The Journal of Sex Research and the Journal of Homosexuality.
Scales of sexual orientation are classification schemes of different sexual orientations. Definitions of the term sexual orientation normally include two components: the "psychological" and the "behavioral" component, but definitions of the two components vary between researchers and across time. Those difficulties motivate researchers to define scales to measure and describe sexual orientation. Most sexual behavior and sexual orientation scales are motivated by the view that sexual orientation is a continuum. The Kinsey scale works from a continuum viewpoint and is the most prevalent sexual orientation scale.
Sexual diversity or gender and sexual diversity (GSD), refers to all the diversities of sex characteristics, sexual orientations and gender identities, without the need to specify each of the identities, behaviors, or characteristics that form this plurality.
Bisexual theory is a field of critical theory, inspired by queer theory and bisexual politics, that foregrounds bisexuality as both a theoretical focus and as an epistemology. Bisexual theory emerged most prominently in the 1990s, in response to the burgeoning field of queer theory, and queer studies more broadly, frequently employing similar post-structuralist approaches but redressing queer theory's tendency towards bisexual erasure.
The history of bisexuality concerns the history of the bisexual sexual orientation. Ancient and medieval history of bisexuality, when the term did not exist as such, consists of anecdotes of sexual behaviour and relationships between people of the same and different sexes. A modern definition of bisexuality began to take shape in the mid-19th century within three interconnected domains of knowledge: biology, psychology and sexuality. In modern Western culture, the term bisexual was first defined in a binary approach as a person with romantic or sexual attraction to both men and women. The term bisexual is defined later in the 20th century as a person who is sexually and/or romantically attracted to both males and females, or as a person who is sexually and/or romantically attracted to people regardless of sex or gender identity, which is sometimes termed pansexuality.
