A guy had a trip he took every year or two. He always went the same way and one time he stopped at a bar along the way. He went in and ordered a drink from the bartender. At the other end of the bar was a jar full of money with a sign that said make the donkey laugh and win all the money in the jar. He asked the bartender if this was serious and the bartender says right this way. He takes the guy out back and there stands a donkey. So the guy walks up whispers in the donkeys ear and he falls down laughing. Then he goes inside drinks his drink, collects his money and leaves.
A year or so later he's going by the same bar and stops in for another drink. At the end of the bar is the same jar full of money. This time the sign says make the donkey cry and win all the money in the jar. So he steps out back while the bartender makes his drink. As the bartender finishes making the drink he hears a commotion out back. He steps out to see the donkey crying uncontrollably. The guy then goes back inside drinks his drink and asks for the money. The bartender says I've got your money but I want to know how you did it? Nobody else even got a rise out of that donkey but you made him laugh, then cry. The guy says well the first time I told him my dick was bigger than his, this time I proved it.