The physiology of sex

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Reduced estrogen levels may be associated with increased vaginal dryness and less clitoral erection when aroused, but are not directly related to other aspects of sexual interest or arousal. Retrieved 12 July Vagino-cervico elevation, however, delays rapid sperm transport and allows the initiation of decoagulation and sperm capacitation before the elevation resolves. The glans at the head of the penis swells and the testes enlarge in the male; in the female, the outer vagina contracts and the clitoris retracts. After orgasm, some women do not want any further stimulation and the sexual arousal quickly dissipates.

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Several hormones affect sexual arousal, including testosteronecortisoland estradiol.

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Sexual intercourse

Erection of nipples Vaginal lubrication Vasocongestion of the vaginal walls Tumescence and erection of the clitoris and labia Elevation of the cervix and uterus Tentingi. Age of first masturbation has been used as a measure to assess sexual development. Archives of Sexual Behavior. Such an approach assumes sexual arousal to be a spontaneous desire that appears periodically like sensations of hunger and thirst. Courtship and copulation human birth control methods In birth control: The third stage involves only contemplation, and the fourth is the unification of all dualities in the sexual act, symbolically or effectively.

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the physiology of sex
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