Sexology

Sexual intercourse, or coitus or copulation, is principally the insertion and thrusting of the penis, usually when erect, into the vagina for sexual pleasure, reproduction, or both.

Virginity is the state of a person who has never engaged in sexual intercourse.

Sex reassignment surgery or SRS (also known as gender confirmation surgery, gender reassignment surgery, genital reconstruction surgery, sex realignment surgery, or, colloquially, a sex change) is the surgical procedure (or procedures) by which a transgender person's physical appearance and function of their existing sexual characteristics are altered to resemble that of their identified gender.

The pubococcygeus muscle or PC muscle is a hammock-like muscle, found in both sexes, that stretches from the pubic bone to the coccyx (tail bone) forming the floor of the pelvic cavity and supporting the pelvic organs.

Paraphilia (also known as sexual perversion and sexual deviation) is the experience of intense sexual arousal to atypical objects, fetishes, situations, fantasies, behaviors, or individuals.

Polysexuality is the attraction to multiple genders.

Hypersexuality is a clinical diagnosis used by mental healthcare researchers and providers to describe extremely frequent or suddenly increased sexual urges or sexual activity.

In biology, mating (or mateing in British English) is the pairing of opposite-sex or hermaphroditic organisms, usually for the purposes of sexual reproduction.

Androphobia is is an abnormal fear of men, a type of specific social phobia.

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.

Transgender people are people who have a gender identity, or gender expression, that differs from their assigned sex.

The Institut für Sexualwissenschaft was an early private sexology research institute in Germany from 1919 to 1933.

Animal roleplay is a form of roleplay where at least one participant plays the part of an animal.

Masters of Sex: The Life and Times of William Masters and Virginia Johnson, the Couple Who Taught America How to Love is a 2009 biography by Thomas Maier.

In evolutionary psychology and behavioral ecology, human mating strategies are a set of behaviors used by individuals to attract, select, and retain mates.

Jonathan Høegh von Leunbach ['lɔjnbɑk] (16 December 1884 - 24 September 1955) was a Danish doctor.

Oragenitalism is a book by the American folklorist Gershon Legman, published by the Julian Press in 1969.

Limerence has been defined by one writer as "an involuntary interpersonal state that involves intrusive, obsessive, and compulsive thoughts, feelings, and behaviors that are contingent on perceived emotional reciprocation from the object of interest".

Galileo's Middle Finger is a 2015 book about the ethics of medical research by Alice Dreger, an American bioethicist and author.

Sexual dysfunction (or sexual malfunction or sexual disorder) is difficulty experienced by an individual or a couple during any stage of a normal sexual activity, including physical pleasure, desire, preference, arousal or orgasm.

Jolan Chang (9 December 1917 - 25 April 2002) was a Chinese-Canadian sexologist and Taoist philosopher who wrote the luminary classics on Eastern Sexuality The Tao of Love and Sex and The Tao of the Loving Couple.

J. William Lloyd (never using his given name John) (June 4, 1857 – October 23, 1940) was an American individualist anarchist from 1884 to around 1904.

A lovemap is a person's internal blueprint for their ideal erotic situations.

The demographics of sexual orientation are difficult to establish for a variety of reasons.