An old lady walks into a bank...

...with $10,000 in cash and says that she would like to deposit it into an account. The male banker asks her where in the world she got $10,000.
"Oh, I'm just really good at making bets," says the old lady.

"really, you made all this money from betting?" asks the banker.

"Yep," said the old lady. "I'll make a bet with you just to prove it. I will bet you $5,000 that your balls are square."

stunned, not expecting to hear something like this, the banker replies that this is untrue.

"Oh yes, I bet you your balls are square. Tell you what, I'll leave and come back tomorrow after you've had time to go home and check for yourself".

The banker thinks to himself that this woman is clearly nuts, but thinks this is quite an easy way to make $5,000 since he is certain his balls are not square.

Next day comes around, and the old woman shows up with a man with her. The banker wonders who the man is, but shrugs it off.

"Okay, sonny, drop your pants, let's see em! I have to inspect them to make sure I was right," says the old woman. The banker does this and the old woman closely examines the banker's balls.

"well, it looks like you were right, they are not square!" says the old woman.

As she does this, the man she was with starts crying. The banker is confused.

"what's with him?" he asks.

"Oh, I bet him $20,000 I'd have your pants down and your balls in my hands by the time we left".