Good lord. Some people need to learn a little bit about cutting as well. Yeah, some people do it just for some random reason, whatever. Some people actually have a point to it though.
It's called 'Endorphins'. And yeah, sure some people might say exercise, but it doesn't work for everyone. Get over yourselves, it's not like what they do even affects you anyway...
@ The Article - Could be interesting. As always though, depends on technology adoption and price.