Valid point. Um, then I'll give another example, from the game I'm working on (if it's not rude to discuss one's own game in another's thread). It's a much darker game, with abduction and forced slavery, not at all the sort of relationship in CC (although it is intended to end that way). At one point, the girl says, "You're a fucking bastard," and he slaps her and says, "Care to rephrase that?" She says, "You're a fucking bastard, sir." He laughs and says, "Okay, you made me laugh, so you get away with that one. Don't try it too often, though."
That said, I too get annoyed with supposedly dominant MCs who put up with too much; it's just that we all put the "too much" line somewhere different. CC puts it in a place I like.