A man walks into his local pub one day, and is surprised to see a big jar of money on the counter. So, he walks up to the bartender.

Man: Hey, whats this jar of money for?

Bartender: It's for a contest.

Man: What kind of contest?

Bartender: Well, you see, there's a guy in the back room who never laughs. Ever. But, if you CAN make him laugh, which you won't, then this money's yours.

Man: Well, I think I'll give it a try.

So, the man goes into the back room. And a few minutes later, the guy in the back room is laughing his head off! The man walks out and the bartender calls his name.

Bartender: Wow! I cant believe you did it! That's amazing!

Man: I believe you owe me some money.

Bartender: I guess i do.

So, the man takes the money, and goes home.

A week later, the man goes back to the bar. He walks in and sees yet another big jar of money on the counter. So, he walks up to the bartender.

Man: What's THIS money for???

Bartender: Well, that guy hasn't stopped laughing since you left! Now, anyone who can make him STOP laughing gets the money.

Man: Ok, I'll try it.

So, the man goes into the back room. And a few minutes later, the guy in the back room is crying his eyes out! The man walks out and the bartender calls his name.

Bartender: Wow! I cant believe you did it again! That's amazing! Here's your money.

Man: Thanks.

Bartender: Ok, I NEED to know, what the hell did you do???

Man: Well, the first time I went in there, I told him that my penis is bigger than his. The second time, I proved it!