Listen to really bad music, smiling and tapping your feet. They'll think it's good! Constantly play "Name that Scale", and laugh whenever they're wrong. Just spend an evening yelling "tone deaf freak" over and over. Make them eat candles. Tie dogs to their eyes. Hit them with an axe until they aren't tone deaf anymore. Kill them and jump and down on their corpse, like on an old mattress. Use them as stuffing in your Christmas turkey - it's the holiday season people let's have some fucking FUN!