As a painless way to save money, a young couple arranged that every time they
have sex the husband put his pocket change into a china piggy bank on the
bedside table. One night while being unusually athletic, he accidentally knocked
the piggy bank onto the floor where it smashes. To his surprise, among the
masses of coins, there are handfuls of five and ten dollar bills. He asks his
wife “What’s up with all the notes?”, to his wife which replies, “Well, not
everyone is as cheap as you are.”