A report on Human sexuality

External male genitals (depilated).
The male reproductive system.
External female genitals (depilated).
The female reproductive system.
A women's liberation march in Washington, D.C., in August 1970, from Farragut Square to Lafayette Park.
A Gay Liberation march in London, UK, c. 1972. A Gay Liberation Front banner is visible. Location is believed to be Trafalgar Square.
The Flirtation, Eugene de Blaas, 1904.

Way people experience and express themselves sexually.

- Human sexuality
External male genitals (depilated).

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

Homosexuality

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Romantic attraction, sexual attraction, or sexual behavior between members of the same sex or gender.

Romantic attraction, sexual attraction, or sexual behavior between members of the same sex or gender.

Zephyrus and Hyacinthus Attic red-figure cup from Tarquinia, 480 BC (Boston Museum of Fine Arts)
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)
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.
A woman spying on a pair of male lovers. China, Qing Dynasty.
Female youths are depicted surrounding Sappho in this painting of Lafond "Sappho sings for Homer", 1824.
Sappho reading to her companions on an Attic vase of c. 435 BC
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).
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.
Blood donation policies for men who have sex with men –Men who have sex with men may donate blood; No deferral –Men who have sex with men may donate blood; Temporary deferral –Men who have sex with men may not donate blood; Permanent deferral –No Data
Original Rainbow Pride Flag in San Francisco, designed by Gilbert Baker in 1978

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.

This Indian Kama sutra illustration, which shows a woman on top of a man, depicts the male erection, which is one of the physiological responses to sexual arousal for men.

Human sexual activity

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This Indian Kama sutra illustration, which shows a woman on top of a man, depicts the male erection, which is one of the physiological responses to sexual arousal for men.
A rolled-up male condom
Sexual intercourse in the missionary position
An Ottoman miniature from the book Sawaqub al-Manaquib depicting homosexuality
A 1925 Gerda Wegener painting, "Les delassements d'Eros" ("The recreations of Eros"), of two women engaged in sexual activity in bed.
A man handcuffed to a bed and blindfolded

Human sexual activity, human sexual practice or human sexual behaviour is the manner in which humans experience and express their sexuality.

Martin van Maële's print Francion 15

Sexual arousal

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Sexual arousal (also known as sexual excitement) describes the physiological and psychological responses in preparation for sexual intercourse or when exposed to sexual stimuli.

Sexual arousal (also known as sexual excitement) describes the physiological and psychological responses in preparation for sexual intercourse or when exposed to sexual stimuli.

Martin van Maële's print Francion 15
Two birds that appear to be exhibiting affection

During the late 1950s and early 1960s, William H. Masters and Virginia E. Johnson conducted multiple studies into human sexuality.

Ladyboys in Thailand

Sexual orientation

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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

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 internal anatomy of the human vulva, with the clitoral hood and labia minora indicated as lines. The clitoris extends from the visible portion to a point below the pubic bone.

Clitoris

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Female sex organ present in mammals, ostriches and a limited number of other animals.

Female sex organ present in mammals, ostriches and a limited number of other animals.

The internal anatomy of the human vulva, with the clitoral hood and labia minora indicated as lines. The clitoris extends from the visible portion to a point below the pubic bone.
Stages in the development of the clitoris
Created by Helen O'Connell using MRI, the first 3D image of a clitoris in an erect state with the adjacent organs of the uterus and urinary bladder
Clitoris; deep dissection
A partially exposed clitoral glans, which can't be fully exposed due to a mild case of adhesions to the clitoral hood
Structures of the vulva, including external and internal parts of the clitoris
The clitoral hood has a normal anatomical variation in size and appearance in different adult women: while it is completely covered by the labia majora in some women, standing with their legs closed, in others it is pronounced and clearly visible.
Clitoral hood (1) and clitoris (2). Labia are spread apart on the bottom image.
An enlarged clitoris due to clitoromegaly
De re anatomica
A Georg Ludwig Kobelt illustration of the anatomy of the clitoris
Girl protesting for clitoris-awareness at a women's rights rally in Paris, 2019
With a urogenital system in which the female urinates, mates and gives birth via an enlarged, erectile clitoris, female spotted hyenas are the only female mammals devoid of an external vaginal opening.
Male and female reproductive systems of the spotted hyena, from Schmotzer & Zimmerman, Anatomischer Anzeiger (1922). Abb. 1 (Fig. 1.) Male reproductive anatomy. Abb. 2 (Fig. 2.) Female reproductive anatomy. Principal abbreviations (from Schmotzer & Zimmerman) are: T, testis; Vd, vas deferens; BU, urethral bulb; Ur, urethra; R, rectum; P, penis; S, scrotum; O, ovary; FT, tuba Fallopii; RL, ligament uteri; Ut, uterus; CC, Corpus clitoris. Remaining abbreviations, in alphabetical order, are: AG, parotid analis; B, vesica urinaria; CG, parotid Cowperi; CP, Corpus penis; CS, corpus spongiosum; GC, glans; GP, glans penis; LA, levator ani muscle; Pr, prepuce; RC, musculus retractor clitoris; RP, Musculus retractor penis; UCG, Canalis urogenital.

The clitoris is the human female's most sensitive erogenous zone and generally the primary anatomical source of human female sexual pleasure.

Kinsey in Frankfurt, November 1955

Alfred Kinsey

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American biologist, professor of entomology and zoology, and sexologist who, in 1947, founded the Institute for Sex Research at Indiana University, now known as the Kinsey Institute for Research in Sex, Gender, and Reproduction.

American biologist, professor of entomology and zoology, and sexologist who, in 1947, founded the Institute for Sex Research at Indiana University, now known as the Kinsey Institute for Research in Sex, Gender, and Reproduction.

Kinsey in Frankfurt, November 1955
Kinsey (center) with staff of the Institute for Sexual Research, later renamed the Kinsey Institute
Alfred Kinsey on the cover of Time in 1953
Kinsey's home in Bloomington
Clara McMillen in the Indiana University yearbook, 1921

Kinsey's research on human sexuality, foundational to the field of sexology, provoked controversy in the 1940s and 1950s.

Erotic Kama statues of Khajuraho Hindu Temple, India

Eroticism

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Erotic Kama statues of Khajuraho Hindu Temple, India
Eroticism in literature. The Old, Old Story, John William Godward, 1903
Symbolic dance by Jan Ciągliński, late 19th-century lesbian erotica (National Museum in Warsaw).

Eroticism is a quality that causes sexual feelings, as well as a philosophical contemplation concerning the aesthetics of sexual desire, sensuality, and romantic love.

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

Kinsey Reports

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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.

The Flirtation (1904), by Eugene de Blaas

Sexual attraction

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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

Human sexuality has many aspects.

A man masturbating by stimulating his penis

Masturbation

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Sexual stimulation of one's own genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm.

Sexual stimulation of one's own genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm.

A man masturbating by stimulating his penis
A woman masturbating by stimulating her vulva – Gustav Klimt's Woman seated with thighs apart (1916)
Two vibrators in a sex shop
One of the illustrations to De figuris Veneris by Édouard-Henri Avril. It portrays a male masturbating while sexually fantasizing
Detail of a krater, dating to c. undefined 560-550 BC, showing a satyr masturbating, a common scene in many ancient Greek pottery paintings
Masturbation was depicted in 19th-century Shunga prints, such as this piece by Kunisada
Self-portrait of Egon Schiele in 1911, depicting masturbation
A temple relief at Khajuraho in Madhya Pradesh, India features a couple in a sexual embrace with a man and a woman masturbating to either side.
Masturbation, 1911, copper engraving by Mihály Zichy
"Every Sperm Is Sacred" performed at the Monty Python reunion, Monty Python Live (Mostly), in July 2014

The sexual stimulation of one's own genitals has been interpreted variously by different religions, the subject of legislation, social controversy, activism, as well as intellectual study in sexology.