No one is 100% straight. NO ONE! Don't be scared of your sexual feelings. I don't know about your religious values, but if they aren't very strict, or you don't have a religion, then there is nothing to worry about. You shouldn't be so worried about what sex you are. There are people that will be mean to you/ won't like you because your bisexual/gay, but that is their problem. Humans are turned on by most things sexual. Even straight guys are turned on by other guys penises. And straight women are turned on by another woman's vagina/breasts. I wouldn't be so worried about what sex you are. Society is becoming more and more accepting of bisexuals/gays. Explore your feelings. There is nothing to worry about. Just think, if your bisexual/gay, you will experience something most straight people will never experience. Most importantly, There is nothing to worry about