Re: am i the only one
You're far from the only one. A lot - maybe most - guys go through a phase of high hormones. The only sexuality you know is guy-sexuality, so that's what gets you going. Nothing wrong with that. Some guys masturbate to only guys, and then switch over to girls. Some never switch over. It's all good; don't worry about it.
I personally only think of girls when I masturbate, and always have. But that's just me.
"I don't believe in magic. But I do believe in interpreting coincidence exactly the way you want to." -Sherman Alexie