I agree with pretty much everything everyone's said. I masturbate, too!
However, I understand about the guilty feelings...when I was religious, I used to feel guilty sometimes. I also had a period when I would masturbate, and for reasons I couldn't explain, feel depressed and horrible afterwards. I told someone this, and the person got mad at me, claiming I was making it up (I guess for attention), because you can't feel bad after having an orgasm. Some people are STUPID!!!
Your sexual preference isn't something you can control, nor should you. Who cares if you like the opposite sex, same sex or both? Yeah, I know there are busybodies who want to control everyone else's sex lives, but they're idiots.