Well, why not? It pays better than teaching a bunch of rude ignorant drugged up kids in an average US public school.
And if your physical attributes need a little improvement, you can get boob jobs, lipo, face restructuring, and this.
Ain’t modern medicine wonderful?
Frozen Tootsies 
I’ve been learning about this myself. http://zipster.wordpress.com/2007/09/02/genital-rejuvemutilation/
But in regards to porn & the perfect cookie cutter designer genitals, here’s a site that performed some additional research I wouldn’t have though to do myself. You might find it interesting. http://jezebel.com/gossip/top/pimp-my-vadge-the-pornographers-opinion-267049.php
P.S. I am a public school teacher. lol.
It was on my list of career options and so now I am! Got the boob job long before I ever thought to become a porn star. Would like to get them bigger now but not because I’m a porn star. I just Love Big Boobs! Think I will leave my sweet little fuzzy red kitty alone. She’s happy the way she is! Purring perfect in fact!