Like mooning, fart jokes, and falling humor [1], a good penis drawing never fails to elicit a cheap and easy chuckle. That's what an 18-year-old in Berkshire, England, thought when he secretly painted a 60-foot penis on the roof of his parents' mansion. They say he'll have to wash it off when he's back from travelling. I wonder who gave them the news . . .

Source [2]