Meh... We're all just flesh bags anyways. We'll all return to the earth some day, but until then, why not have fun with it?
Also, there is a pretty cool character building aspect to it; especially in terms of stretching. It puts you in tune with your body, the way it heals, it's limits, and it forces you to respect patience and timing. I can see how some cultures have applied spiritual aspects to body modifications...
The only experience I have with body modification is negative. I didn't do it for me, I did it because I was bullied and pressured to conform to stereotypes that didn't fit me to begin with. The damage from this mutilation is permanent. Add to that the fact that I've not felt comfortable in my body since I was a kid, and... well... I'm not going to view any of this in a positive light on a personal level.