There was this docter and he had just got done with one of his sex sessions with one of his patients. After completion of five weeks treatment he conducts examination for all five. So he asks all of them to pedal the cycle which was stood on the stand itself. All the patients starts cycling.
Doctor expects the person who stops pedling is the one who is cured.
So he observes quite a long time. At last one patient stops pedling and sitting straigt on the cycle itself. On the bench opposite him are 3 old ladys. He unbuttons his coat and flashes his bits at them. The first woman has a stroke.