Most Helpful Guy
Guys don't have sleep-overs. They hang out, and sometimes they might crash for the night.
Anyway, when guys are hanging out together, most of the time they are talking about their mutual interests. That might be cars, movies, sports, music, work, or whatever. If they're single, they might talk about girls, about girls they've seen that are attractive, or about ways to get girls. If they are dating, they usually don't talk much about their own girl, and almost never any details. People know they're together, and that's usually all they need to know.
It's rare for guys to talk about their own girls in any detail in a group of guys. If a guy is having a specific problem, he might ask another guy one-on-one, but even then, the details given are usually only the bare minimum to get help.
To be fair, if it's a one-night-stand or something, or a short-term FWB that's over, guys can be much more open about details, but that's because it was never more than "just sex" to him, so it isn't really personal to him.