I've never really thought about this before - I remember getting told about ten years ago that I forcibly ejected a penis when I decided I didn't want sex and he said what the hell did you just do?
I've just started having sex again last couple days but then he suddenly said what the hell is your vagina doing, it just gripped? I didn't know it was doing that and I can't control it. It's got a mind of it's own.
I guess as long as he knows it might get up to own stuff that's fine?!?!