dont shower for weeks. build up dick cheese on or around your ball sack. then let it dry out. then have a chick take her teeth in a cheese grater like fashion and grate the cheese off your sack for you. do with it what you want afterwards.
When you are wearing a sports jersey with those little holes on a cold day, and the holes scrape across your nipples, making it feel like someonejust cheese gratered your nipples.