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Vaginal sex (also called vaginal intercourse or coitus) involves the insertion of the male sex organ (penis) into the female sex organ (vagina). Vaginal intercourse is the usual method for producing offspring in organisms that reproduce sexually, including humans.

In people who have sexual relationships with members of the opposite gender (i.e., heterosexuals), vaginal sex is the most common type of sexual intercourse. Other types of vaginal sex include cunnilingus (oral sex performed on a w...Read the full article