What's wrong with men?

How come that most guys just tell me that they want to have sex with me? Actually I have been told that I look like a porn star, and it really pisses me of because first of all I don't dress provoking, I tend to dress cute and try to be as natural as I can by that I mean I don't put on a lot of make up. I'm more of a person who got her life together, I don't party a lot because I just don't have time for it. I don't act slutty or anything, I don't know are those guys just screwed up now days or is it just me.