> As an aside, same with cheating in movies/series

As an aside from an aside, I find very interesting how every couple of main characters in movies has couple problems (cheating, lost of interest, one of them don't want to engage the other, etc). Taking a look at my list of recently watched movies (including very diverse ones, like Godfather, KPop Demon Hunters, Whiplash, Sunset Boulevard, Up, etc) and I cant't find a single one that we don't question whether the couple will stay together...

Actually, the only two exceptions that I remember are Marty/Jennifer from Back to the Future and Ferris/Sloane from Ferris Bueller's Day Off...