Most people that choose to have sexual intercourse do so because they enjoy the sexual stimulation and the physical and emotional feelings that usually accompany intercourse. Vaginal intercourse happens when a penis is inserted into the vagina.

Every time you have vaginal intercourse, there is a chance you can get an STI and, if you are a female, become pregnant.  If you are having vaginal intercourse, respect your body and your partner's by using condoms so you don't get an STI (or pass one on to your partner).  You can use a female condom or a male condom.  If you aren't ready to have a baby, you should also consider using an additional method of birth control.