A man goes to a bank and asks to deposit $5,000 into his account.

The next day, he comes back and deposits $10,000. The next day, he comes back and deposits $7,500. As he walks out, the banker asks him how he gets so much money in a day. The man walks up to him and whispers, “I make bets with people.” The banker tells him, “How do you make so much?” The man says, “Here, I bet $50 you have a birthmark on your ass.” The banker says no, but the man wants proof. The banker pulls down his pants and shows him that there is no birthmark, but the man is still smiling. The banker asks why. The man says, “Because I bet each person in the building $50,000 that I could get you to pull down your pants.”