Yeah, when I was younger I wasn't quote sure what I wanted. I knew I was not monogamous though I would never cheat. So I thought that just mean swinging. Yet everyone always had these horror stories about swinging. Most of them were about someone accidentally falling in love with another person or someone not able to handle it after all.
When I finally discovered polyamory, I liked the idea that it was mostly about the relationship itself. I realized some of the problems of swinging were not really there for polyamory. Mostly in polyamory, the focus is on communication to solve issues. I also saw it as having good stability as long as people were communicating.