I feel weird

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’m 19 my brother who is 16 showed me a video of one of his friends girlfriend and told me “isn’t she hot?” I feel like I did find her attractive and then I asked what her age was and he said 14. Why did I find her attractive if she’s that much younger than me? I’m also having trouble seeing girls in public I think are attractive but don’t know their age. They could be young and I still might find them attractive. Sometimes I force myself to look at these girls more than usual to really determine what their age is and if I find them attractive. I don’t stare intensely but it definitely feels strange doing it. Is this a problem that I can’t figure out if girls I find attractive are around my age? Or even if I know they are younger than me sometimes I might find them attractive? Why would I find them attractive if they’re too young for me?