When you see somebody, have you ever thought, I wish I can be just like him/her. Maybe I am not good looking enough, not tall enough, too fat or millions of other weaknesses that you can think of.
You should not think like that, because, one, nobody is perfect and two, you are just adding stress to yourself when you start comparing yourself with others, and most of the time, there ain't much you can do about it, so why worry too much.
I know some people are very concerned about their size..
You got to be kidding me =.=
If you were to ask 100 men on which one they prefer, I believe you will get different answers, and would you prefer a guy to like you just for your size. Think about that.