Do they have to be, or are they just so hot and cool that they get tired of trying to get them to MOVE BACK?

Idk, is it because it's dark here and this is how they live their lives? If you're actually happiest in a relationship, and you can get into one, then do that... Even if people throw shade at you for it. It's no one else's business, your relationship is yours and it's between you and your partner. Not a bunch of onlookers.