Human genitals

Ida; Mooyaart, Eduard. Magnetic resonance imaging of male and female genitals during coitus and female sexual arousal. BMJ. 1999, 319 (7225): 1596–600

Reader, New York: Routledge. p. 320. Fausto-Sterling, Anne "Of Gender and Genitals" from Sexing the body: gender politics and the construction of sexuality

Masturbation refers to all solo forms of self-stimulation focusing on the genitals. Masturbation practices vary widely depending upon the individual's body

Prometheus Books: ISBN 0-87975-754-X Money, John. The Adam Principle: genes. genitals, hormones, and gender: Selected readings in sexology. Buffalo, N.Y.: Prometheus

'tribadism,' where two women lie face to face, one on top of the other. The genitals are pressed tightly together while the partners move in a grinding motion