I was kind of passively monogamous until hooking up with a polyamorous woman on Tinder. I started a relationship with her and even though I made some attempts at dating other people, this mostly just became her having sex with other guys and me being involved with her exclusively. But I found out that I have zero jealousy, like none at all, as long as she had the time and attention for me. I found out a lot about myself that I didn't expect.
So, anyway, I wanted to create a thread about positive experiences with polyamory, due to a thread on the test instance.
I've always been super monogamous but I get what you mean. I've been cheated on and I was surprised to realize that the only part that really bothered me was the lying. Like you, I experienced almost no jealousy over the act. In all honesty, I was a little bit relieved to realize that that's what was causing the distance toward the end.
Up to and including our brief fling, I would describe the two of us as acquaintances at best - neighbors who decided to try dating for a little bit. The conversation we had when I confronted her was the start of a decade-long friendship that's still going strong. She gets back to the US later this month and I'm excited to catch up.
While this isn't a polyamory success story, there was never a moment of bitterness that followed once we had an honest talk. To me, that relationship proved that honesty is the only part that really matters. The rest is negotiable.