Can’t stop thinking of something I said when I was younger..

So, when I was in about the 3rd grade I was at a sleepover for the first time and we were all watching some movie, and for some odd reason I said I wanted to have sex with one of the characters. And I remember my friends parents started cracking up, and I don’t think I even knew what I was saying. I was never taken advantage of or exposed to anything bad when I was younger, so I’m not sure where it came from. But for some reason it still haunts me that I said that, and idk why I can’t just let it go as something funny. Is it normal for kids to say things like that? Anyone have similar

Stories? Sorry if I sound ridiculous but I’m an over thinker lol