"Sex" may include many things, from intimate touching to vaginal or anal intercourse.

These terms are often used:

• Sexual contact may involve genital touching, skin-to-skin contact, mutual masturbation, mouth-to-genital contact (oral sex), or sexual intercourse.
• Sexual intercourse can refer to vaginal sex (penetration of the vagina), oral sex (mouth to penis, vagina, or anus), or anal sex (penetration of the anus).