I know a nurse who was directly affected by this - and this nurse is honestly one of the best nurses I have ever known. Because he is male, all that had to be said was "harrassment" - and he was transferred (luckily - it was an upward move, because he was above reproach, but the fact that there was even the possibility that someone could use those words and bring about a big response, justified or not, is horrible.)
So - while I cuss like a sailor and secretly listen to Eminem in the parking lot (shhh... don't tell anyone, please?) - there's no room for X-rated talk no matter what your gender/orientation/experience.
Personally, I'd try a well placed - "TMI!" or "Save it for the parking lot, ladies." But, I have issues with management and HR.
Certainly, if I were a guy, I'd figure out some way to cover my own rear (sorry if that term is offensive.
) Maybe a quick email to the supervisor or HN saying something like "I recently asked a group of my peers to keep the conversation G-rated while at work and I wanted to let you know about it in case anyone came to you. I wouldn't want the patients to overhear anything innappropriate that would reflect negatively on our team and our facility. Thanks, Nurse So-and-So."
Then if anything ever comes back to you, you can not only say you were innocent, but that you tried to create positive change.
But that's just a thought. Maybe I'm a wimp, too.