a golfer, playing a round by himself, is about to tee off, and a greasy little salesman runs up to him, and yells, "wait! before you tee off, i have something really amazing to show you!"
the golfer, annoyed, says, "what is it?"
"it's a special golf ball," says the salesman. "you can never lose it!"
"whattaya mean," scoffs the golfer, "you can never lose it? what