After many hours of extremely acrobatic and exhausting sex with a blonde

he had just picked up, a man goes into the kitchen for some food to

replenish his just-spent energy. He pours himself a glass of milk and

right before drinking it, he realizes his manhood is still pretty hot, so

he sticks it in the glass to cool it off.  Just then the blonde walks in

and says, "Oh, I always wondered how you refilled those."