The human vagina is serviced by nerves that respond to vasoactive intestinal polypeptide VIP. Gender binary Gender identity Men who have sex with men Sexual identity Sexual orientation Women who have sex with women. In other projects Wikimedia Commons. The findings suggest that VIP may participate in the control of the local physiological changes observed during sexual arousal: genital vasodilation and increase in vaginal lubrication. Main article: Personal lubricant. Reproductive Health Matters.
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