Fantasy about being the other sex
Not having a girlfriend, I help myself now-and-then, not surprising. Often I imagine actually being with a girl, not surprising either. But occasionally, I imagine being the girl, having sex with another guy. And it turns me on.
Note that in that fantasy, I have a female body as well. In real life, I wouldn't want to have sex with a guy. I'm not even attracted to other guys. Maybe if I had a female body, but I don't and I wouldn't want surgery for that either, my body is pretty much OK the way it is. It's just a fantasy, nothing more. But is such a fantasy normal? Am I the only one who has a fantasy like this sometimes?
If you're a girl, fantasizing about being a guy obviously also counts.