A guy went into a bar and the owner told him he could have free drinks all night if he made the donkey in the corner laugh.
So the guy went over to the donkey and whispered in the donkey's ear and the donkey burst out laughing.
The owner gave the guy free drinks all night.
The guy went into the same bar the next night and this time the owner told him that if he could make the donkey cry that he'd give him free drinks all night.
So the guy went over to the donkey and before you know it, the donkey was crying.
When the guy got back to his table the owner asked him how he made the donkey laugh one night and cry the next.
The guy said, " last night I told him mine was bigger than his, and tonight I showed him".