What is it like being a teenage guy?

Okay, so I'm a girl and yeah I've heard that guys think about sex like every 5 seconds but I can't honestly believe that. Even I can't think about something too much, it gets old fast and you move on. I mean, some times I hate sex and want nothing to do with (I'm 15, by the way). So how is it that guys can spend their entire teenage years sex crazed and if so, how do they handle it? I mean, isn't that tiring? Thinking about sex all day. Is it difficult and annoying some times or do guys actually like feeling horny every damn day? I don't get it. How is that even possible? Somebody please enlighten me.