I suffer from Golf Balls

A man entered the bus with both of his front pockets full of golf balls, and sat down next to a beautiful - you guessed it - blonde. The blonde kept looking quizzically at him and his bulging pockets. Finally, after many such glances from her, he said, "It's golf balls". Nevertheless, the blonde continued to look at him thoughtfully and finally, not being able to contain her curiosity any longer, asked "Does it hurt as much as tennis elbow?"