If I’m with a cool FO we will sit there BSing about random stuff, talking crap about other people, and planning the layover. When it's a meh FO they'll talk while I pretend to care. Sometimes I sit there doing the cruise items required by both the PM and PF since airplane WiFi is way too easy for a FO to covertly use, and Tinder is obviously more important than things like fuel planning. Also, I spend a lot of time explaining, “Well your last captain was a moron. Have you ever actually opened the book? Read it, don’t trust what some captain told you – it’s usually wrong”.
This job works for me.