Bi Curious, need some help, only 15?

I really would not worry too much about this. Many guys can get turned on around your age by naked women and men. It may be that you are just going through a phase and your ual attraction to guys will fade. It also may be that you are and that either turns you on and will continue to for life. I am but I have a preference to guys. Either way you are fine and should not be worried that you are not normal. Later on you may decide to act on your ual attraction to guys and hook up with one or more. I am a person who believes you should try something to see if you do like it. Try it and find out.