Alternatively, of course, Jim could abandon M&S completely and go elsewhere for those elusive and desirable Y-fronts. The interesting thing is that music is a far more complex and sophisticated set of spiritual, cultural experiences than Y-fronts - or indeed anything that, for example, fits into a can with a label on it.

That's why these eternal wranglings about the nature and taxonomy of the music continue.

The important thing to remember is that all taxonomies are relative - skewed to the originators of the taxonomies and their aims.