An ex introduced me to the hotwife idea and now I can’t stop thinking about it

I’m 19F and single now, but an ex was the first person who ever brought up the idea of watching me with someone else. At the time I acted shy about it, but honestly it stuck in my head way more than I expected.

I’m curvy, dark haired, and I’ve always liked feeling wanted, but this felt different. It wasn’t just attention. It was the idea of being desired while someone who cared about me was turned on by it too.
Now that I’m single, I keep wondering if this is something I actually want in a future relationship or if I just liked the fantasy because it felt taboo. Did anyone else have the idea planted early and only realize later how much it turned them on?