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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 field of psychology has extensively studied homosexuality as a human sexual orientation. The American Psychiatric Association listed homosexuality in the DSM-I 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 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.
Various non-human animal species exhibit behavior that can be interpreted as homosexual or bisexual. This may include same-sex sexual activity, courtship, affection, pair bonding, and parenting among same-sex animal pairs. Various forms of this are found in every major geographic region and every major animal group. The sexual behavior of non-human animals takes many different forms, even within the same species, though homosexual behavior is best known from social species.
Frot or frotting is a gay sexual practice that usually involves direct penis-to-penis contact. The term was popularized by gay male activists who disparaged the practice of anal sex, but has since evolved to encompass a variety of preferences for the act, which may or may not imply particular attitudes towards other sexual activities. This can also be used as some type of foreplay.
Animal sexual behaviour takes many different forms, including within the same species. Common mating or reproductively motivated systems include monogamy, polygyny, polyandry, polygamy and promiscuity. Other sexual behaviour may be reproductively motivated or non-reproductively motivated.
The pelvic thrust is the thrusting motion of the pelvic region, which is used for a variety of activities, such as dance, exercise, or sexual activity.
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 a 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."
Penis fencing is a mating behavior engaged in by many species of flatworm, such as Pseudobiceros hancockanus. Species which engage in the practice are hermaphroditic; each individual has both egg-producing ovaries and sperm-producing testes.
Against Nature? was an exhibition on homosexuality in animals made by the Natural History Museum at the University of Oslo, Norway. The exhibition focused on the occurrence and function of homosexuality in animals. It ran from September 2006 to August 2007.
Patterns of Sexual Behavior is a 1951 book by anthropologist Clellan S. Ford and ethologist Frank A. Beach, in which the authors integrate information about human sexual behavior from different cultures, and include detailed comparisons across animal species, with particular emphasis on primates. The book received positive reviews and has been called a classic. It provided the foundation for the later research of Masters and Johnson.
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.
Richard C. Friedman was an academic psychiatrist, the Clinical Professor of Psychiatry at Weill Cornell Medical College, and a faculty member at Columbia University. He has conducted research in the endocrinology and the psychodynamics of homosexuality, especially within the context of psychoanalysis. Friedman was born in The Bronx, New York.
Animal non-reproductive sexual behavior encompasses sexual activities that non-human animals participate in which do not lead to the reproduction of the species. Although procreation continues to be the primary explanation for sexual behavior in animals, recent observations on animal behavior have given alternative reasons for the engagement in sexual activities by animals. Animals have been observed to engage in sex for social interaction bonding, exchange for significant materials, affection, mentorship pairings, sexual enjoyment, or as demonstration of social rank. Observed non-procreative sexual activities include non-copulatory mounting, oral sex, genital stimulation, anal stimulation, interspecies mating, and acts of affection, although it is doubted that they have done this since the beginning of their existence. There have also been observations of sex with cub participants, same-sex sexual interaction, as well as sex with dead animals.
Social selection is a term used with varying meanings in biology.
Homosexual behavior in sheep has been well documented and studied. The domestic sheep is the only species of mammal except for humans which exhibits exclusive homosexual behavior. "About 10% of rams (males), refuse to mate with ewes (females) but do readily mate with other rams." Thirty percent of all rams demonstrate at least some homosexual behavior. One report on sheep found that 8% of rams exhibited homosexual preferences—that is, even when given a choice, they chose male over female partners. This documented homosexual preference has garnered much discussion. Such rams prefer to court and mount other rams only, even in the presence of estrous ewes. Moreover, around 18–22% of rams are bisexual.
References
- ↑ McDonald, Maggie (January 4, 2006). "Biological Exuberance by Bruce Bagemihl". New Scientist . Retrieved March 10, 2018.
- ↑ Fletcher, Martin (January 3, 2007). "Birds do it, bees do it ..." The Times . Archived from the original on February 17, 2007.
- ↑ Bagemihl, Bruce (1988). Alternate phonologies and morphologies. University of British Columbia Library: University of British Columbia. doi:10.14288/1.0097954.
- 1 2 "Publisher-supplied biographical information about contributor(s) for Biological exuberance : animal homosexuality and natural diversity / Bruce Bagemihl ; illustrated by John Megahan". catdir.loc.gov. Library of Congress. Retrieved 18 September 2017.
- 1 2 Harrold, Max (February 16, 1999). "Creature Comforts". The Advocate . No. 779. Here Publishing. pp. 61–62. Retrieved March 10, 2018.
In his news book, Biological Exuberance: Animal Homosexuality and Natural Diversity ... author Bruce Bagemihl portrays an animal kingdom that embraces a whole spectrum of sexual orientations ... [and] a complex mosaic that resembles humanity ... 'It's an expanded vision of what the natural world is all about,' [Bagemihl] says. 'We're not alone in having a range of sexual behaviours. This is something that is all-encompassing.' ... At 751 pages and with photos and documentation of homosexual behaviour in more than 450 species of mammals, birds, repties, and insects, Biological Exuberance brings the dusty facts to light as Bagemihl deconstructs the all-heterosexual Noah's Ark we've been sold. ... Although he doesn't claim to know the motivations of animals, Bagemihl says he does know procreation is not always the driving force: 'Same-sex couplings occur in the presence of the opposite sex, and in and out of captivity, and in and out of mating season.'
- 1 2 Kluger, Jeffrey (April 26, 1999). "The Gay Side of Nature". Time . Archived from the original on February 22, 2008. Retrieved March 10, 2018.
Although gay himself, Bagemihl says he did not write his landmark book (which he spent nine years researching) simply because of his own sexual identity but rather because 'the implications for humans are enormous.'
- ↑ American Psychological Association; American Psychiatric Association; National Association of Social Workers; Texas Chapter of the National Association of Social Workers (January 2003). "Brief for Amici Curiae in Support of Petitioners in the case of John Geddes Lawrence and Tyron Garner v. State of Texas" (PDF). Retrieved March 10, 2018.
- 1 2 Smith, Dinitia (February 7, 2004). "Love That Dare Not Squeak Its Name". The New York Times . Retrieved April 8, 2023.
