Two monger friends happen to bump into each other leaving the agency incall one day.  

"How are things?" the first John asks.  

"No so great" the second John say. "I've gotten myself into a big financial mess. With all my hobbying, I'm $15,000 in debt. The only way out that I've been able to think of is to take the $15,000 challenge to beat The Pretzel in an MMA match."  

John 1 is shocked. "You can't do that! The Pretzel is huge and he ties all his opponents into knots. You don't stand a chance!"

"I have to, I don't have any other choice. In fact I've already signed up and the match is Tuesday at 7 if you want to come watch," John 2 says.

Tuesday John 1 arrives at the arena just as John 2 enters the ring against The Pretzel, who immediately starts to tie John into knots. John 1 can't watch and buries his head in his hands, then hears a loud scream and a roar from the crowd. He looks up just in time to see The Pretzel fly into the air and land flat on his back, out cold.

John 1 rushes into the ring, slaps John 2 on the back to congratulate him, and asks him how he did it.

"Well, I was all tied up in knots and had just about given up hope when I opened up eyes and saw a huge pair of balls in front of my face. I knew it was my last chance, so I reached out and bit those balls with everything I had," John 2 said.

"Then what?"

"Do you have any idea how much of an adrenaline rush you get from biting your own balls?"