“You just don't get it”. Damn the person who invented this argument. It cuts as deep into a conversation as a sharp ballpoint pen pushed harshly into soft white paper, stabbing at any preceding sentence with its bitter finality. It's a killer of conversations. It shares its place as cutting statements with “I find that quite offensive”, “What? I'm not pregnant” and “My husband actually died quite recently”. The really grating thing about all these responses is that there's nothing particularly wrong with any of them. They all have gravity for a reason. The latter ones I now realize in my attempt to find any sentences which can end a conversation in a funny and recognizable way all have one problem, that they can only be spoken when you've done something wrong in some way. You made a poor call of judgement.