An elderly man marries a very young woman but he can't satisfy her in bed. He confides in a friend who says, "Hey I know a folk remedy for this. Hire a young man to stand next to the bed and wave a towel over you." The old man does that but it doesn't work. He tells his friend so. The friend says, "Yeah, that happens sometimes. Try switching places." So the young man gets into bed with the wife while the old man waves the towel. The wife has orgasm after orgasm, and the old man shouts in triumph, "See? That's how you wave a towel!"