The main reason for vaginal sensitivity is that the vaginal nerve endings are very rich and cause local contraction of the vagina through contact. Especially when having sex, the sexual contact will cause the vaginal mucosa and muscles to be excited, resulting in local contraction and vaginal tightness. It is normal for both men and women to reach orgasm very quickly after sex, mainly because of more local nerve endings. The clitoral area in particular is more sensitive and richer in nerves, which can easily lead to sexual excitement when touched. So usually pay attention to the hygiene of the vulva, especially during sex and menstruation, to avoid pathogenic infections that cause increased local secretions or discomfort.