Zephyrus and Hyacinthus
Attic red-figure cup from Tarquinia, 480 BC (Boston Museum of Fine Arts)
External male genitals (depilated).
Burning of two homosexuals (the knight Richard von Hohenburg and his squire Anton Mätzler) at the stake outside Zürich, 1482 (from the Spiezer Schilling chronicle)
The male reproductive system.
Dance to the Berdache
Sac and Fox Nation ceremonial dance to celebrate the two-spirit person. George Catlin (1796–1872); Smithsonian Institution, Washington, D.C.
External female genitals (depilated).
A woman spying on a pair of male lovers. China, Qing Dynasty.
The female reproductive system.
Female youths are depicted surrounding Sappho in this painting of Lafond "Sappho sings for Homer", 1824.
A women's liberation march in Washington, D.C., in August 1970, from Farragut Square to Lafayette Park.
Sappho reading to her companions on an Attic vase of c. 435 BC
A Gay Liberation march in London, UK, c. 1972. A Gay Liberation Front banner is visible. Location is believed to be Trafalgar Square.
Photograph of the Finnish artist Touko Laaksonen (1920–1991) alias Tom of Finland, well known for his stylized highly masculinized homoerotic art, playing the piano in late 1950s. In the background, his partner Veli Mäkinen (left) and his sister Kaija (right).
The Flirtation, Eugene de Blaas, 1904.
An illustration from the 19th-century book Sawaqub al-Manaquib depicting homosexual anal sex with a wine boy
Shah Abbas I of Persia with a boy. By Muhammad Qasim (1627).
U.S. President Barack Obama signs into law the Don't Ask, Don't Tell Repeal Act of 2010
LGBT activists at Cologne Pride in 2015 carrying a banner with the flags of 70 countries where homosexuality is illegal
Protests in New York City against Uganda's Anti-Homosexuality Bill.
Roy and Silo, two New York Central Park Zoo male chinstrap penguins similar to those pictured, became internationally known when they coupled and later were given an egg that needed hatching and care, which they successfully provided.

While some people believe that homosexual activity is unnatural, scientific research shows that homosexuality is a normal and natural variation in human sexuality and is not in and of itself a source of negative psychological effects.

- Homosexuality

This is further supported by cross-cultural evidence, because cultures that are very tolerant of homosexuality do not have significantly higher rates of it.

- Human sexuality
Zephyrus and Hyacinthus
Attic red-figure cup from Tarquinia, 480 BC (Boston Museum of Fine Arts)

9 related topics

Alpha

Ladyboys in Thailand

Sexual orientation

Enduring pattern of romantic 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.

Enduring pattern of romantic 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.

Ladyboys in Thailand
Gay Pride, Paris 2009

These attractions are generally subsumed under heterosexuality, homosexuality, and bisexuality, while asexuality (the lack of sexual attraction to others) is sometimes identified as the fourth category.

In 2012, the Pan American Health Organization (the North and South American branch of the World Health Organization) released a statement cautioning against services that purport to "cure" people with non-heterosexual sexual orientations as they lack medical justification and represent a serious threat to the health and well-being of affected people, and noted that the global scientific and professional consensus is that homosexuality is a normal and natural variation of human sexuality and cannot be regarded as a pathological condition.

An intimate heterosexual couple

Heterosexuality

Romantic attraction, sexual attraction or sexual behavior between people of the opposite sex or gender.

Romantic attraction, sexual attraction or sexual behavior between people of the opposite sex or gender.

An intimate heterosexual couple
A heterosexuality symbol
This image is often used on Straight Pride T-shirts

Along with bisexuality and homosexuality, heterosexuality is one of the three main categories of sexual orientation within the heterosexual–homosexual continuum.

Katz argues that modern ideas of sexuality and eroticism began to develop in America and Germany in the later 19th century.

Gender symbols intertwined. The red (left) is the female Venus symbol. The blue (right) represents the male Mars symbol.

Gender

Range of characteristics pertaining to femininity and masculinity and differentiating between them.

Range of characteristics pertaining to femininity and masculinity and differentiating between them.

Gender symbols intertwined. The red (left) is the female Venus symbol. The blue (right) represents the male Mars symbol.
Gender depicted as an ambiguous phenomenon, by a young Swedish actor
A protester holding a flyer with the words "Gender is like that old jumper from my cousin. It was given to me and it doesn't fit" at a rally for transgender equality in Washington D.C. in 2013
Mary Frith ("Moll Cutpurse") scandalized 17th century society by wearing male clothing, smoking in public, and otherwise defying gender roles.
"Rosie the Riveter" was an iconic symbol of the American homefront in WWII and a departure from restrictive, "feminine", gender roles due to wartime necessity.
Spain's desperate situation when invaded by Napoleon enabled Agustina de Aragón to break into a closely guarded male preserve and become the only female professional officer in the Spanish Army of her time (and long afterwards).
Yin and yang
A bar graph comparing poverty differences based on age and gender in 2012.

Sometimes Gender studies is offered together with Study of Sexuality.

For example, the sociological approach to "gender" (social roles: female versus male) focuses on the difference in (economic/power) position between a male CEO (disregarding the fact that he is heterosexual or homosexual) to female workers in his employ (disregarding whether they are straight or gay).

The 1948 first edition of Sexual Behavior in the Human Male, the first of the two Kinsey Reports

Kinsey Reports

The Kinsey Reports are two scholarly books on human sexual behavior, Sexual Behavior in the Human Male (1948) and Sexual Behavior in the Human Female (1953), written by Alfred Kinsey, Wardell Pomeroy, Clyde Martin, and (for Sexual Behavior in the Human Female) Paul Gebhard and published by W.B. Saunders.

The Kinsey Reports are two scholarly books on human sexual behavior, Sexual Behavior in the Human Male (1948) and Sexual Behavior in the Human Female (1953), written by Alfred Kinsey, Wardell Pomeroy, Clyde Martin, and (for Sexual Behavior in the Human Female) Paul Gebhard and published by W.B. Saunders.

The 1948 first edition of Sexual Behavior in the Human Male, the first of the two Kinsey Reports

The two best-selling books were immediately controversial, both within the scientific community and the general public, because they challenged conventional beliefs about sexuality and discussed subjects that had previously been taboo.

Parts of the Kinsey Reports regarding diversity in sexual orientations are frequently used to support the common estimate of 10% for homosexuality in the general population.

Freud (1856–1939) was skeptical of the possibility of therapeutic conversion.

Conversion therapy

Freud (1856–1939) was skeptical of the possibility of therapeutic conversion.
A survivor and outspoken critic of conversion therapy, in November 2014, Sam Brinton was one of the first two individuals to testify before the UN Committee Against Torture regarding the practice.
OneByOne booth at a Love Won Out conference
J. Michael Bailey says the available lab studies measuring arousal response have not supported men's claims of sexual re-orientation.

Conversion therapy is the pseudoscientific practice of attempting to change an individual's sexual orientation from homosexual or bisexual to heterosexual, or their gender identity from transgender to cisgender, using psychological, physical, or spiritual interventions.

In 2012, the Pan American Health Organization (the North and South American branch of the World Health Organization) released a statement cautioning against services that purport to "cure" people with non-heterosexual sexual orientations as they lack medical justification and represent a serious threat to the health and well-being of affected people, and noted that the global scientific and professional consensus is that homosexuality is a normal and natural variation of human sexuality and cannot be regarded as a pathological condition.

The Flirtation (1904), by Eugene de Blaas

Sexual attraction

Attraction on the basis of sexual desire or the quality of arousing such interest.

Attraction on the basis of sexual desire or the quality of arousing such interest.

The Flirtation (1904), by Eugene de Blaas

For example, a gay or lesbian person would typically find a person of the same sex to be more attractive than one of the other sex.

Human sexuality has many aspects.

Lot prevents sodomites from raping the angels, Heinrich Aldegrever, 1555.

Christianity and homosexuality

Lot prevents sodomites from raping the angels, Heinrich Aldegrever, 1555.
Execution by fire and torture of five homosexual Franciscan friars, Bruges, 26 July 1578
Christian protesters at a 2006 gay pride event in San Francisco.
Friendship between Jonathan and David by Julius Schnorr von Karolsfeld (1860)
Rev. Troy Perry preaching in 2006 at a Metropolitan Community Church.

Within Christianity, there are a variety of views on sexual orientation and homosexuality.

The Hebrew Bible and its traditional interpretations in Judaism and Christianity have historically affirmed and endorsed a patriarchal and heteronormative approach towards human sexuality, favouring exclusively penetrative vaginal intercourse between men and women within the boundaries of marriage over all other forms of human sexual activity, including autoeroticism, masturbation, oral sex, non-penetrative and non-heterosexual sexual intercourse (all of which have been labeled as "sodomy" at various times), They have believed and taught that such behaviors are forbidden because they're considered sinful, and further compared to or derived from the behavior of the alleged residents of Sodom and Gomorrah.

Ellis in 1913

Havelock Ellis

Ellis in 1913
Edith Lees and Havelock Ellis
Commemorative plaque dedicated to Ellis and his wife at Golders Green Crematorium
Inmate of Elmira Reformatory showing four views of head The Criminal (1890)

Henry Havelock Ellis (2 February 1859 – 8 July 1939) was an English 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.

The two spirit contingent marches at San Francisco Pride 2014.

Two-spirit

Modern,, umbrella term used by some Indigenous North Americans to describe Native people in their communities who fulfill a traditional third-gender (or other gender-variant) ceremonial and social role in their cultures.

Modern,, umbrella term used by some Indigenous North Americans to describe Native people in their communities who fulfill a traditional third-gender (or other gender-variant) ceremonial and social role in their cultures.

The two spirit contingent marches at San Francisco Pride 2014.
Drawing by George Catlin (1796–1872) while on the Great Plains among the Sac and Fox Nation. Depicting a group of male warriors dancing around a male-bodied person in a woman's dress, non-Native artist George Catlin titled the painting Dance to the Berdache.
The two spirit pride trolley at San Francisco Pride 2014

Some who enthusiastically took up the term and used it in the media said that this new, English-language term carried on the full meaning and implications of the Indigenous-language terms used in-community for the specific traditional, ceremonial roles that the anthropologists had referred to – emphasizing the role of the Elders in recognizing a two-spirit person, stressing that "Two Spirit" is not interchangeable with "LGBT Native American" or "Gay Indian", and that the title differs from most western, mainstream definitions of sexuality and gender identity in that it is not a modern, self-chosen term of personal sexual or gender "identity", but is a sacred, spiritual and ceremonial role that is recognized and confirmed by the Elders of the Two Spirit's ceremonial community.

Crow: batée. A word that describes both trans women and homosexual males.