Wife Swapping
The OP grew up in a broken home when, at just six years old, their dad decided he’d had enough and left. A decade later, the OP found a mysterious list that contained all of the things that could’ve saved his marriage. We decided to cover up the first two since they’re not PG-safe, but the third point is the one that deserves the most attention.
Wife swapping. “Man, if only my ex-wife would’ve let me sleep with the neighbor’s wife on occasion, as well as other wives in the neighborhood, we would still have the perfect family.” Yeah, right, dude. Your ex-wife dodged a bullet.