Penis on the brain

So me and this guy started messaging each other on Twitter. We know each other through mutual friends, we've hung out a couple times in group settings but we never did talk like that. Hadn't seen or talked to him in about 3 years. He was always fine AF though 🙌🏾 Anyway, it started with this silly question game on Twitter.
"Plead the Fifth: Like this and I'll dm you a question I want to ask you, then quote this tweet with a honest answer or say I plead."
I asked him "Where's the craziest place you've had sex" (don't ask lol) He of course plead the fifth on the timeline, but from there he slid in my DM's & things got extra freaky from there. The whole convo was wild, extremely random, but exciting! He was leaving for school out of state in a few days, so a couple days after we started messaging each other/exchanged numbers, we met up to have sex. I came by his job during his break, & we ended up fucking in my car. Even tho we didn't have much time & it got hot af in the car, the sex was bomb. This happened last week and I still can't get it off of my mind! Is it normal to still be on a high after sex for this long? I feel like I should be over it by now but I find myself still daydreaming about it. We weren't able to meet up again and now he's gone for school. I don't want anything from him but sex to be honest, but omg I can't stop thinking about what happened! I think I'm still in shock cause of who it happened with, and how random it was. And I haven't been around much, so it's a big deal for me. It was a liberating feeling for me to do what I want to do without the fear of judgment. But anyway back to my question is it normal to still be dickmatized after a week? Lol