A fellow passed a house with a little red light burning in front, so he stepped inside. There was nothing in sight and nothing there but an empty bare hallway, with two doors reading, "Over 35" and "Under 35." He decided to be truthful and entered the door that said, "Over 35."
He found himself in another empty hallway, this one with two doors that read, "Over 8 inches" and "Under 8 inches." Truthful again, he went through the "Under 8 inches" door and found himself in another empty hall, with two more doors reading, "Once a night" and "Over 4 times a night." Still wanting to be truthful, he entered the door marked " Once a night" and found himself back out on the street.
The moral of this story is: "Always tell the truth and you'll never get screwed."