I dont think it really has much to do about vanity, except for maybe people who get a living out of what they look like. i mean of course there are exceptions, but i just think it has to do with self esteem and bettering one's view on his/herself. i used to be against it, until i began realizing how peoples' lives can change, how their self esteem changes, there are people who really do get affected by the physical details they dislike in their faces and bodies, and perhaps undergoing a plastic surgery barely does change that person, but the security and self esteem boost comes instantly, and i think that's really important. and i'm not referring to people who have had everysingle facial feature of theirs changed.