On Friday, I went to the library. Afterwards, I was walking along happily with my many Doctor Who DVDs – er, I mean, um, stimulating classic novels – in tow when I heard singing upon the wind. It resolved into Katy Perry’s “Hot N Cold”. And then I heard a reggae beat.

Happily, it took only a few more seconds of rushing forward in horror to realise that I was hearing two separate songs. While it lasted, it was one of the more politically confusing moments of my life.