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Penile-vaginal intercourse
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Penile-vaginal intercourse or vaginal intercourse is a form of penetrative sexual intercourse in human sexuality, in which an erect penis is inserted into a vagina.[1] Synonyms are: vaginal sex, cohabitation, coitus (Latin: coitus per vaginam), (in elegant colloquial language) intimacy, or (poetic) lovemaking. (Some of the synonyms are used for other variants of sexual intercourse as well.) It corresponds to mating or copulation in non-human animals.
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.
- ^ Levin, Roy (2016). "Penile-Vaginal Sex". Encyclopedia of Evolutionary Psychological Science. pp. 1–4. doi:10.1007/978-3-319-16999-6_3365-1. ISBN 978-3-319-16999-6.
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