Old lady enters the National Bank's building...

...with a bag full of bank notes and asks to talk with the president of said bank. She says there's a lot of money to talk about, so the employees reluctantly allow the lady to meet with the president. When they meet, he asks the old lady how much money she wants to put in the bank.

"165,000 dollars" she answers and empties her bag on the president's table.

The president is intrigued about the origin of such money and asks:

"Dear lady, may I ask where this money comes from?"

"Bets" she answers.

"Bets? What kind of bets?"

"For example, I bet 25,000 dollars your balls are rectangular!"

"Hahaha, that's a stupid bet, you cannot hope to win that!"

"So you accept, do you?"

"Of course! I'll bet you 25,000 dollars that my balls aren't rectangular."

"Perfect. Since we're talking about a large amount of money, let's meet tomorrow morning at 10 in the presence of my lawyer as witness, shall we?"

"Okay, works for me" says the president smugly.

That night, the president gets nervous. He's sure he'll win, there is no way his balls are rectangular, but he still observes them in the mirror over and over again before going to sleep.

Next morning, at 10, the old lady is back at the bank with her lawyer. She introduces the lawyer to the president and repeats the bet:

"25,000 dollars that the president's balls are rectangular!"

The president accepts the bet again. The old lady asks the president to take his pants off, then if she may touch the president's balls.

"Since we're talking about 25,000 dollars, you may. I want you to be sure about your observations" he says.

At this point, the president sees that the old lady's lawyer is banging his head into the wall.

"What the hell is your lawyer doing?" he asks the old lady.

"Oh nothing, it's just that I bet 100,000 dollars with him yesterday evening that today at 10am the balls of the National Bank's president are gonna be in my hands..."