How do i stop worrying about morality

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

So one day a couple months ago I saw some posts on threads pop up on instagram and they said I’m 17 and horny and 18 and horny or I think I even remember see a 16 year old one. I’m 20 and I remembered that when those popped up I clicked on them and I don’t know if I did it out of true attraction or out of the urge to make my anxiety go away. I feel like often times if I see something that says any number under 18 even if it has nothing to do with age it could be talking about season 17 of a tv show my mind immediately goes what?? 17??? And then I click on it to make my anxiety go away. So when I remembered all of this I downloaded the threads app because I wanted to see if I could get reassurance and see if I could rekindle how I felt in these moments. When I opened the app all I saw was posts like that but everyone claimed to be 18. The only problem is none of the girls looked 18 they looked like 14-16 so I started to panic I and worry that because I clicked on the threads in the past it popped up more and I was a pedophile for that. All of the accounts all pretty much had only fans links so at that point I was like well they have to be 18 then but now I’m worried that maybe it’s a scammer and they are using underage pictures of girls and putting them on onlyfans. Which I know is out of my control but I just feel like a Pedo and like I did something wrong. Does anyone have any advice? Or have any similar situations/ similarities with this?

I have no idea anymore. I guess this all started with me worrying about whether I was gay, then whether I was a P, then worried about being just attracted to teenagers. After that I started freaking out about not feeling “grown up” enough. Like “I’m an adult wtf is wrong with me for seeing someone who is probably younger and thinking they’re physically attractive. Then I started overthinking not finding older adults (like 30 or 40) very attractive. Like ofc I’m probably not gonna find them attractive, they’re not anywhere close my age. Maybe the desires are half real. Maybe as a 21 yr old young adult I do find older teenagers (16+) somewhat physically attractive. I still think it’d be weird to date one. Maybe that’s the normal reaction I’m supposed to have. If not, please let me know. I just don’t wanna do anything illegal one day and I’m super scared I will. I can’t tell if the fear is my just being afraid of the law though, in which case I might actually just be a bad person. I hate that my brain is just rationalizing thoughts now. I feel like I can’t do the ERP thing of “just accept that the thoughts are there but don’t engage.” Like what? How can I just think a thought that might be so integral to my identity and just ignore it? If it’s all true and I don’t like people my age anymore then I have to know and plan around that, that could change my entire life. I’m rambling, my b.