After many hours of extremely acrobatic and exhausting sex with a blonde he had just picked up,

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."