Now, this is probably a bit of an obvious choice. Nisemonogatari’s ‘tooth-brush sex’ is a sure-fire contender for everyone’s list this festive season, and with due reason- it was bleedin’ brilliant! For those not in the know (just where have you been!?), it involves the show’s main character Araragi subjecting his younger sister, Karen, to psychological torture, in the form of brushing her teeth. That sounds weird enough as it is, but wait, it gets weirder! The pair get a little too into the entire rigmarole, if you know what I mean… Mental, no? But brilliant regardless.