So, there's this girl that called my girlfriend a couple times.
They used to have this "thing," so being the jealous person I am, obviously I was pissed.
Then, a few days ago, I actually saw a picture of her and, suddenly, I wasn't so jealous.
Truth be told: She's just unflattering PERIOD.
I went on to rant about how ugly she is and how she looks like a cow and my girlfriend got angry with me.
At first I didn't care, but then my girlfriend told me why she had a "thing" with her. It wasn't because of her looks, but her personality. Apparently, she's a nice person. (Nice person or not, I don't appreciate the phone calls.)
I started to feel a little bad because here I was judging some girl I didn't know as a person and just started to criticize based on her looks. But here's my reason:

I'm insecure.
For those who did not know me, I was the stereotypical "emo" kid in high school.
I was picked on ENDLESSLY in high school because of how I looked.
I didn't think I was attractive.
After high school, however, I started to grow into my looks and appreciate my image more. Unfortunately, this caused me to be a bit of a bitch. Now that I knew I looked good, I started to criticize those who were in the same spot I was a few years ago.
In a way, it's because I still have that little bit of insecurity left in me.
I will truthfully admit that, from time to time, I can be that person who puts others down just to make myself feel better about how I look. I know a lot of other people that do this too, but at least I'm admitting it.
The thing is, though, no matter how much I mentally laugh at and criticize these people, doing so won't me look prettier. If anything, it makes me look more unattractive.

It's something I'm trying to work on.