What's the big deal? All you have to do is listen, it's not like she's asking you for an advice. As she finds more friends, she will probably stop sharing these details. Guys don't talk to each other about this stuff but if a guy were to talk to me about this, I would just listen, no matter how uncomfortable I get. That's what friends are for.
There is a big deal, your ears start hurtin' cuz you don't wanna hear what's goin' between husband and wife when they r alone...
Someone who shares bedstories will find himself in the worst position on the day of judgement...