Penile–vaginal intercourse

Penile–vaginal intercourse, or vaginal intercourse, is the primary form of penetrative sexual intercourse in human sexuality, in which an erect penis is inserted into a vagina. It corresponds to mating or copulation in non-human animals. Synonyms are: vaginal sex, coitus (Latin: coitus per vaginam), (in elegant colloquial language) intimacy, or (poetic) lovemaking; some of which are used for other forms of intercourse as well. Cohabitation is a related term describing a living arrangement.

Various sex positions can be used. Following insertion, additional stimulation is often achieved through rhythmic pelvic thrusting or a gyration of the hips, among other techniques. The biological imperative is to achieve male ejaculation so that sperm can enter the female reproductive tract and fertilize the egg, thus beginning the next stage in human reproduction, pregnancy.

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