Share 'Where do you draw your "squick" line?'

Not in terms of a moderation policy, but just out of general curiousity: What puts the "TM" in "TMI" for you? Big serious fights we've had with our partners? Menstruation? Non-traditional sex? Any version of sex? Flirtation? Details about past rape or abuse? Childbirth? Other bodily functions? Is sexual content more offensive when it's earnest? Or is it more offensive when it's a joke? I know I…