Moving the penis in between the two boobs.

the art of remembering an arousing occurrence or some porn you watched while masturbating, often handy if you have no porn or your in the shower

the act of placing a penis in between two "titties" and making a humping motion.

When a man puts his dick between a woman's breasts and thrusts until ejaculation. Usually results in a pearl necklance.

ramming one's penis rapidly in between a set of gigantic tits

Thrusting a throbbing hard cock into to some humongous boomers.

A commonly performed sexual act involving a man gently placing his penis in between a women's breasts, usually resulting in ejactulation on said womens chin.