It's playing in shops everywhere, you walk in, you hear it, you feel "that" line coming. But you hold back, you don't know for sure whereabouts in the song you are? Is it this chorus? Is it the next? You glance at other male shoppers for help, they're going through the same thing. They too want to impress their partners with their Neanderthal proclaimation of Yuletide. But nobody wants to get it wrong. For there lies ridicule and solitude.