Actually I find ball busting a form of art. I know a couple of people that are so good at it that they actually sense your comfort level - and maneuver right below the treshold.
This is the kind of people you call when your bored - take them out and beg them to mock you!
Actually I find ball busting a human form of: http://www.youtube.com/watch?v=mNvQ2AC23cg . It's what young males do to learn about social cause/effect. I find it less damaging to one's personality to what young girls do to each other.