Early one morning, while his son was getting ready for his first day of school, his father took him aside and proceeded to instruct him on the appropriate way to urinate. "Okay, son: one, unzip your pants. Two, take out your penis. Three, pull back the foreskin. Four, pee into the urinal. Five, shake your penis off. Six, push back your foreskin. And, finally, replace your penis and zip your fly back up." Later that day the father received a call his son's teacher. "What seems to be the problem?" he asked. "Well," the teacher said somewhat perplexed, "It appears that your son doesn't want to leave the bathroom." "Oh, really? What's he doing in there?" "We're not sure. He just keeps repeating, "Three-six, Three-six. "