fantasizing about men feels weird, it feels "right" with women😭

Am I the only one who experiences this, or is it more common than I think? Sometimes, I find myself imagining what a couple’s sex life might look like, or what a person’s body might be like. I think it’s driven by curiosity, and I focus on it for a few seconds. When it comes to family members, teenagers, or anyone I feel uncomfortable imagining in this way, I used to be able to shake it off as an intrusive thought. But lately, I can’t seem to let go of it anymore. I’ve become used to the anxiety, but I’m stuck questioning what this means about me, especially since I’ve taken time to think about it. This is really stressing me out because I feel like a pervert. I’m hoping that this is something more common than I realize and that OCD is just distorting something. I feel like I really need some insight here. Any advice?

So I identify as a lesbian and I am in a committed relationship with a wonderful girl. But i’m stressing that I have crushes on boys I go to school with. I get anxious around them, which I think I mistake for excitement. I obsess over it in my head which confuses me a lot. Idk I also never think about them sexually or romantically but I think about them often which is scaring me. Any advice?

Why are things so real the first time they’re in my mind and then when I think about it later it’s easier for me to be like wtf?? I was watching a movie earlier and the young girl had developed more in the chest area than the last movie and I felt the desire to check her out so I did. Then later I let myself imagine her having sex and I liked it. But now looking back I’m like ew. The boys in the movie have also developed as the movie went on and I couldn’t help but think that in their real life they’ve probably woken up to boners and s*men and stuff. And looking back it’s just ugh. Idk if it’s sexual relevance but I genuinely let myself indulge in these thoughts and groinal responses and I remember thinking to myself I don’t want to be attracted to little kids and how do I stop myself (everyone has attractive qualities so in younger boys I see man like qualities). Idk I need help. I wouldn’t type this out if I truly believe I was messed up but I’m still scared