
I recently learned about the stag and vixen terms while looking into the same question. It is nice to have a word for it.
I also enjoy some dominance of my partners when having sex with other people, just as I do in other sexual contexts. But my most prominent feeling when my partners have had sex with other people, with or without my involvement, has just been a joyous “Hell yeah, we got some! Go team!”

Last year I borrowed a 3D camera from the library to try making a VR home sex tape. The outdated software led to some double-vision at the edges of the shot, and we are anything but professional pornographers (in one shot, you can see one of my partners knocking over a floor light at the edge of the scene as we moved around 😅). But it was a fun and novel experience.