Sexology

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.

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.

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.

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.

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

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.

Polysexuality is the attraction to multiple genders.

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

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

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

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

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".

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.

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