Thanks to DomNull4U and Joys.The vast majority of my swinging/voyeur experiences happened a long time ago so many details are lost . I'll keep trying to remember more.
Actually, one episode does stand out. It came back to me after seeing all the posts on humiliation of the cuckold.
I was filming my girlfriend sucking yet another older guy and she was using her best technique. He was sitting in a soft chair and she was kneeling on the floor in front of him. I was moving around behind them trying to get the best angle. The sucking had been going on for about 20 minutes or so and I guess I was making a pest of myself moving around and all. She was having a pretty good time and looked up at him and asked "How am I doing?" The guy said to her " You're doing just fine, keep it up, yea just like that" and things of that nature. Then he said to me " How how you doing ?" Well, before I could answer I noticed her reaction to his question. She smiled and looked at him and gave a little laugh with a quick glance at me. I felt kind of stupid but did get a jolt of excitement from the obvious small humiliation. It was the first time I felt those feelings and it was quite pleasurable. I got kind of turned on by it. We never followed through with all that and didn't even talk about it.Looking back it would have been great to explore those feelings with her and him,too.