PRICES MAY VARY. WHAT IS THE NUT BUTTON: C’mon man, seriously? It’s the most useful (or useless, depending on your power level) sound toy since… ever. Seriously, this is the most useful gadget ever created. If you don’t know what to get your wife’s boyfriend this holiday season – you just found the perfect easy gift. We both know that things haven’t been the same between you two since last year's office Christmas party, but if you get him this, she’ll finally treat you like the man you used…