Here's my two cents, even though it's not the original topic.
If I was chatting with friends about my sex life, I would certainly not be discussing it in a bragging sense, but it can be a topic of great hilarity. Sometimes sex can be wonderfully intense, or deeply loving and romantic. On other occasions it can be downright funny, and those are the ones I'm more inclined to mention especially if it's at my own expense. If I had a genuine problem, I could also rely on friends to provide a sensible answer. And I have to say that i would have no problem with my partner doing the same. I would respect her wishes if she didn't want me to discuss anything at all, but I'd prefer it if she didn't mind me mentioning the time we fell out of bed etc.