A guy orders a beer. The bartender fills the mug and slides it down the bar.
It hits a blonde woman's boobs and splashes all over them. The bartender goes over, retrieves the mug and licks the beer off her boobs.
Each time the guy calls for another beer this happens.
So after his third beer, he decides to help the bartender out. The next time the bartender hit her boobs, the man jumps up and starts to lick her breasts.
She immediately decks him!
He is laying on the floor moaning, "Jeez lady... Why do you let the bartender do it?"
"Duh," says the blonde, "He has a licker license."
Stolen from: Hale McKay of It Occurred To Me