I just followed a link to the site I've never visited before called "already pretty" by Sally McGraw (I know, you probably all know about it already, but I'm a newbie). As I was browsing around, I found a good article on the topic of vanity. I like what she has to say on the subject:

http://www.alreadypretty.com/category/psychology

Incidentally, Sally looks A LOT like me....or, I guess, I look like her. Funny.