I've started to notice that my sexual fantasies and attractions have changed as I've gotten older. I used to be able to fantasize about topping a woman, but as time has gone on I noticed I only have fantasies about bottoming or being in the woman's position as I watch straight sex. At this point I don't see myself topping a woman or have the want to do so, but I don't believe I'm gay. I feel like my attractions have changed but am not sure why it would have shifted this dramatically. My therapist thinks I need to have sex with women again but I just can't see myself topping again and actually enjoying myself. I'm still attracted to women physically and that hasn't changed much, but my sexual attractions towards men has never been this intense in my life and it's really confusing. I keep doubting if I'm really even bisexual and it's starting to bug me. I know your sexuality can shift throughout your lifetime, but I have no idea why my sexuality would change this much!