I Like a Good Joke

There's an elderly man with a much younger girlfriend, who he can't satisfy sexually. So, he decides to see his doctor for advice. The doctor says, 'Next time you make love, employ a handsome, muscular young man to stand by your bed, vigorously swinging a towel above his head the entire time. That should do the trick.' So the man hires a really fit male model for the night and then has sex with his girlfriend while the male model stands next to their bed, vigorously swinging a towel above his head. Nothing happens. The model politely suggests that the two men swap places, so that the model has sex with the girl and the man swings the towel. They swap places and, within two minutes of having sex with the muscular male model, the girl has multiple orgasms. The man looks at the model and says, 'See? That's how you swing a towel!'