So a man walks into a bar and he sees

a donkey sitting at the very end. As he sits down to order a drink, he notices a glass jar full of dollar bills with a sign saying "Make the Donkey Laugh."

The man orders his drink and asks the bartender "So all I gotta do is make him laugh?"

The bartender replies "Sure 'nuff. Just put in a dollar an' have at it." The man finishes his beer, places a dollar in the jar, and walks over to the donkey. He leans over and whispers in the donkey's ear. The donkey starts he-hawing and laughing until he falls on the floor. The man walks up to the counter, grabs the jar of money, and walks out.

About a week later, the man returns to the bar and sees that the donkey is once again at the end of the bar and another jar of money is placed on the counter.

The man asks "So same deal? Make him laugh?"

"Naw," said the bartender "This time you gotta make him cry." The man thinks for a moment and orders a beer. After a few swigs, he places a dollar in the jar and walks over to the donkey.

While the bartender was turned around he almost missed the man walking out of the bar with the money once again while his donkey sobbed uncontrollably on the bar.

"Now just a second," said the bartender "I gotta know what you did to my donkey to make him laugh and cry!"

"Well," said the man "last week I said my dick was bigger than his. Tonight I showed him."