Vaginal sex (also called vaginal intercourse) is one of many ways for partners to give and receive sexual pleasure. Vaginal sex is when partners place a penis, sex toy or dildo into a vagina. Then both people move together to create friction, which produces pleasure. For partners who choose to have vaginal sex, the most effective way to avoid a pregnancy and/or STDs is by using hormonal birth control, like the pill, and/or a condom. Typically, vaginal sex is done between a male and female partner, but two girls or women can also use toys to have vaginal sex.