Golf Balls ... !

A man entered the bus with both of his front pockets full of golf balls and sat down next to a beautiful blonde. The puzzled blonde kept staring at him and his bulging pockets.

Finally, after many such glances from her, he said, "It's golf balls."
Nevertheless, the blonde continued to stare at him for a very long time, deeply thinking about what he had said.
After several minutes, not being able to contain her curiosity any longer, she asked,
"Does it hurt as much as tennis elbow?"