The football coach noticed that his star tackle, Bubba had so
many women hanging around that he couldn't possibly handle all of
them.  So one day he asked Bubba, "Just what the hell is your
secret?"

So Bubba replies, "Well Coach, whenever I'm about to have sex, I
always whip it out and bang it on the dresser like a hammer. 
That numbs it and I can screw 'em forever!"

The coach went home early one day, and went to the bedroom.  He
heard his wife in the shower. Seeing a window of opportunity, he
tore off his clothes and started banging it on the dresser.

His wife stuck her head out of the shower and said, "That you
Bubba?"