Sexual intercourse

Penetrative sexual activity for reproduction or sexual pleasure

Sex, more formally known as sexual intercourse, coitus, or copulation, is an intimate social activity typically involving the insertion of the erect male penis inside the female vagina and followed by thrusting motions for erotic pleasure, biological reproduction, or both. This specific type of sex is also known as vaginal intercourse (or vaginal sex). However, other forms of penetrative sexual intercourse also exist, including anal sex (penetration of the anus by the penis), oral sex (penetration of the mouth by the penis or oral contact with or penetration of the female genitalia), fingering (sexual penetration by the fingers) and penetration by use of a dildo (especially a strap-on dildo), and vibrators.

From Wikipedia, under CC BY-SA. More on occurri.