After a young man had grown up and become a man, he and his father were seated in front of the TV, during a football game. During halftime exercises, his dad remarked, "Son, every time I gave you a whipping when you were bad, you would go into the bathroom and spend about 30 minutes, scrubbing the toilet. You got it spotlessly clean, and I could never figure out why you did that". Without taking his eyes off the TV, the young man replied, "I was just getting even with you, for whipping me". The father, startled, replied, "How? By cleaning the toilet?" "No", the son answered, "by scrubbing it with YOUR TOOTHBRUSH".