Discussing your partner's sexual performance with your mates is disrespectful. If both parties are fine with it then whatever though.
As to why they do it, I don't know, maybe to compare notes? lol you tell me!
Discussion
I agree. I'm private with that. From my experience, women only went into detail to talk about how much he sucks in bed, has a small dick, make fun and to humiliate the guy.
They don't respect the guy they are with. In my opinion, it's their way of telling other women that he isn't a real man.
It's belittling. They don't do this with men they respect.
That sucks, they should just dump him with dignity, that's a bit cruel. I'm sure men do similar fucked up shit too though. I'm private with that also, it would not be cool with me at all.