Am I a pervert ? What should I do ?

I'm 16 and I think I'm a pervert. I'm gay and I'm utterly comfortable with that. Though, I think I'm a pervert because I like men a LOT. Everytime I see a muscular man, or a young athlete guy I feel like a fire. I want to go over him ! I really think I should not be looking at men's bulges as I stride around the streets. I watch porn quite often. I don't like a certain kind of men. Sometimes I even get surprised about the kind of men I find myself looking at. I also use to think dirty thins when I see a man I really feel attracted to. Is all this stuff abnormal ? I feel guilty for liking men that much and be thinking about them when I shouldn't. I feel horny about them :S I feel as though I were a double freak :S