SJ said that friends do share intimate stories, and yet we only have Kimmy saying anything.
You generally have to trust the people you're dealing with.
I remember sitting in my cubicle one day when the girl next door (literally) comes over early in the morning, very bubbly because she got some on the weekend. And, she confided, she'd been introduced to anal sex, and loved it.
So yes, friends to share intimate stores. That doesn't necessarily mean graphic stories, of course.