Earworm: what a wonderful word. It describes, as nothing else quite can, the effect a really invasive melody can have on your consciousness. Hear the song once and you will hear it again and again, on a loop in your brain. At the pub quiz the other night, the answer to a question was Brotherhood of Man, and at least two of us subsequently suffered the torture of hearing ‘Save Your Kisses For Me’ in our heads for the rest of the evening.