[Blueface]

A piano player in a bar has a trained monkey that runs around to customers and collects tips while the guy plays piano.

In between songs the monkey hops up onto the bar and squats over a man's drink and dips his testicles into the beverage then scampers away.

Miffed, the man approaches the piano player and says, "do you know your monkey dipped his balls in my martini?"

Piano player says, "no, but if you hum a few bars i can probably pick it up".