A guy walks into a bar, sits down, and orders a drink. He notices a monkey in a cage behind the bar and asks about it.

"You don't want to know," answers the bartender.
A few beers later, the guy says, "Come on, I gotta know what the deal is with the monkey."

"OK, I'll show you," says the bartender. He then takes the animal out of the cage and whacks it on the head with a bat. The monkey pulls down the bartender's pants and starts giving him a blow job. He looks at the guy and says, "You want to try it?"

"Hell, yeah," says the guy. "But don't hit me that hard."