I have always identified myself as straight and have had emotional and physical attractions to women, but I sometimes have physical attractions and sexual curiosity about men. When I watch porn, I sometimes imagine myself in the woman's position, and then often switch off to watch gay porn. After that, I don't feel any more attraction to men. I don't normally have any attraction towards guys in real life, the way I am attracted to women. It's normally just in porn and fantasizing.
You may very well be bisexual. Judging by your fantasies, you probably are. Does this really matter to anyone? Probably not. Humans tend to fantasize at all the times. Some people are notorious daydreamers. Does that make them into Batman, Superman, clown or Sandokan? I do not think so. You'll either act upon your impulse, and establish a certain pattern of sexual behavior or you won't. In real life terms, only your actions, not your fantasies will determine your sexual orientation towards other people. KD