I had a threesome midway through last year. It was a Devil's threeway though, so it doesn't count.
3 guys?
I don't think I could have a threesome. I'm hard pressed making post coital chit chat with my current girlfriend, let alone some other lass.
Me and another guy. He had a tiny dick though, so it was more of a two and a half way.
There is no rule that you need to talk to them afterwards.
You are worrying about unnecessary things !!