Knock before you enter

The act of tapping the head of one's penis just above their partner's vagina when about to commence doggystyle intercourse. It is done as a sign of respect similar to knocking on a door before entering a room.

Dani: Do you have to knock before you enter?
Mike: Of course! Do you think I'm a man without manners?

by analbeads=juniormints February 19, 2019