When a male ejaculates into his hand. He then proceeds to rub the semen onto the testicle hair and then runs the testicle hair over the woman's face. Hence, giving her the dirty paintbrush

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.

When a man has anal sex with a woman, then uses the remaining excrement on his dick to paint on the woman's back.