Swinging fits neatly into what I’ve described. You get new sexual partners, spread your genes around to more people/babies. With more babies with new people, the stagnation doesn’t set in and so the desire to leave doesn’t manifest in the same way. Now you’ve got me curious about the divorce rate for swingers.

my name is going first on the research paper.

Fair

Edit: the divorce rate among swingers is either 95% if you listen to pearl clutching Christians or “significantly lower than national average” if you listen to dubiously researched random articles from a search engine, so take what you will from that, I guess.