Dog In A Bathtub
From Wikiporno
This is the proper name for when you attempt to insert your nuts into a girl's anus. It is so named because it can be just as hard as keeping a dog in the tub while giving it a bath.
A variant of this act, known as "the clowning," occurs when the penis is inserted into the vagina while the scrotum is placed in the asshole, resulting in a one-man double penetration. Its most well-known appearance was in the infamous Blacks On Blondes "Booyah!" video featuring Tony Eveready and Alisha Angel.
