Anal sex or anal intercourse is generally the insertion and thrusting of the erect penis into a person's anus, or anus and rectum, for sexual pleasure. Other forms of anal sex include anal fingering, the use of sex toys, anilingus, pegging, as well as electrostimulation and erotic torture such as figging. Although anal sex most commonly means penile–anal penetration, sources sometimes use anal intercourse to exclusively denote penile–anal penetration, and anal sex to denote any form of anal sexual activity, especially between pairings as opposed to anal masturbation.
Sexual intercourse is sexual activity involving the insertion and thrusting of the male penis inside the female vagina for sexual pleasure, reproduction, or both. This is also known as vaginal intercourse or vaginal sex. Sexual penetration has been known by humans since the dawn of time, and has been an instinctive form of sexual behaviour and psychology among humans. Other forms of penetrative sexual intercourse include anal sex, oral sex, fingering and penetration by use of a dildo, and vibrators. These activities involve physical intimacy between two or more people and are usually used among humans solely for physical or emotional pleasure. They can contribute to human bonding.
The hymen is a thin piece of mucosal tissue that surrounds or partially covers the vaginal opening. A small percentage are born with hymens that are imperforate and completely obstruct the vaginal canal. It forms part of the vulva and is similar in structure to the vagina. The term comes straight from the Greek, for 'membrane'.
Virginity is the state of a person who has never engaged in sexual intercourse. The term virgin originally only referred to sexually inexperienced women, but has evolved to encompass a range of definitions, as found in traditional, modern and ethical concepts. Heterosexual individuals may or may not consider loss of virginity to occur only through penile-vaginal penetration, while people of other sexual orientations often include oral sex, anal sex, or manual sex in their definitions of losing one's virginity.
The Masters and Johnson research team, composed of William H. Masters and Virginia E. Johnson, pioneered research into the nature of human sexual response and the diagnosis and treatment of sexual disorders and dysfunctions from 1957 until the 1990s.
Henry Havelock Ellis was an English-French physician, eugenicist, writer, progressive intellectual and social reformer who studied human sexuality. He co-wrote the first medical textbook in English on homosexuality in 1897, and also published works on a variety of sexual practices and inclinations, as well as on transgender psychology. He developed the notions of narcissism and autoeroticism, later adopted by psychoanalysis.
Marty Ralph Klein is an American sex therapist, author, educator and public policy analyst. Klein has spent his career supporting the healthy sexual expression of men, women and couples in a wide range of ways. He is critical of censorship, the concepts of sex addiction and porn addiction, as well as the anti-pornography movement. He believes that public policy relating to sexuality should be driven by scientific data rather than emotion, "tradition" or popular but untrue myths. He has been a participant in various state, federal and international court cases dealing with the First Amendment, obscenity, censorship and "harmful to minors" laws.
The Velvet Underground is a paperback by journalist Michael Leigh, published in September 1963, that reports on paraphilia in the USA.
Human reproduction is sexual reproduction that results in human fertilization to produce a human offspring. It typically involves sexual intercourse between a sexually mature human male and female. During sexual intercourse, the interaction between the male and female reproductive systems results in fertilization of the ovum by the sperm to form a zygote. While normal cells contain 46 chromosomes, gamete cells only contain 23 single chromosomes, and it is when these two cells merge into one zygote cell that genetic recombination occurs and the new zygote contains 23 chromosomes from each parent, giving it 46 chromosomes. The zygote then undergoes a defined development process that is known as human embryogenesis, and this starts the typical 9-month gestation period that is followed by childbirth. The fertilization of the ovum may be achieved by artificial insemination methods, which do not involve sexual intercourse. Assisted reproductive technology also exists.
Sexualization is the emphasis of the sexual nature of a behavior or person. Sexualization is linked to sexual objectification, treating a person solely as an object of sexual desire. According to the American Psychological Association, sexualization occurs when "individuals are regarded as sex objects and evaluated in terms of their physical characteristics and sexiness." "In study after study, findings have indicated that women more often than men are portrayed in a sexual manner and are objectified. In addition, a narrow standard of physical beauty is heavily emphasized. These are the models of femininity presented for young girls to study and emulate."
Forever... is a 1975 novel by Judy Blume dealing with teenage sexuality. Because of the novel's content it has been the frequent target of censorship and appears on the American Library Association list of the 100 Most Frequently Challenged Books of 1990–2000 at number seven.
Comprehensive Sexuality Education (CSE) is a sex education instruction method based on a curriculum that aims to give students the holistic knowledge, attitudes, skills, and values to make healthy and informed choices in their sexual lives. The intention is that this understanding will help students understand their body and reproductive processes, engage in safer sex by reduce incidents of contracting sexually transmitted infections (STIs) such as HIV and HPV, reduce unplanned and unwanted pregnancies, as well as lowering rates of domestic and sexual violence.
Feminist sexology is an offshoot of traditional studies of sexology that focuses on the intersectionality of sex and gender in relation to the sexual lives of women. Sexology has a basis in psychoanalysis, specifically Freudian theory, which played a big role in early sexology. This reactionary field of feminist sexology seeks to be inclusive of experiences of sexuality and break down the problematic ideas that have been expressed by sexology in the past. Feminist sexology shares many principles with the overarching field of sexology; in particular, it does not try to prescribe a certain path or "normality" for women's sexuality, but only observe and note the different and varied ways in which women express their sexuality. It is a young field, but one that is growing rapidly.
Masturbation is a form of autoeroticism in which a person sexually stimulates their own genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. The stimulation may involve the use of hands, everyday objects, sex toys, or more rarely, the mouth. Masturbation may also be performed with a sex partner, either masturbating together or watching the other partner masturbate.
Robie Harris was an American author. She wrote more than 30 children's books, including the frequently challenged It's Perfectly Normal (1994) and It's so Amazing (1999).
It's So Amazing! A Book about Eggs, Sperm, Birth, Babies, and Families is a 1999 children's book about pregnancy and childbirth. It is written by Robie Harris and illustrated by Michael Emberley.
In 2011, the average number of televisions per household in the United States was 2.5 with 31% of Americans owning four or more televisions. Research shows that the average American watches over 4 hours of television each day. Leading television networks reach approximately 60% of television viewers in the United States per week on average. A study conducted in 2005 by the Kaiser Family Foundation determined that eight- to eighteen-year-olds spend on average six and a half hours a day with media in general. American teenagers alone spend 11.2 hours watching television a week according to another market research study conducted by Teen Research Unlimited. They also found that these teens listen to FM radio 10.1 hours per week, spend 3.1 hours playing video games per week, and surf online for a total of 16.7 hours per week. MTV is the favored television channel to watch among both boys and girls in America, averaging over six hours a week viewing it. Research also shows that on any day a teenager is exposed to over 200 cable television networks, 5,500 magazines, 10,500 radio stations, over 30 million websites, and over 122,000 recently published books. Multiple forms of media can be seen throughout society in almost every facet.
Sex and the Love Life by the American author William J. Fielding is a non-fictional book published in 1927 in New York. It deals with the contemporary understanding of sexuality and its relation to the love life in many fields of life.
In contemporary societies, the appropriateness of childhood nudity in various social situations is controversial, with many differences in behavior worldwide. Depending upon conceptions of childhood innocence and sexuality in general, societies may regard social nudity before puberty as normal, as acceptable within same-sex groups, or unacceptable.
The Care and Keeping of You: The Body Book for Girls by Valorie Lee Schaefer is an educational children's book about puberty, female health and hygiene. It was written for readers aged eight years and older, and does not mention sex or sexuality. The book was first published in 1998 by American Girl, a U.S. doll company, under its Advice Library imprint.
