Just a Gwai Lo - fun within prescribed limits

Douglas Adams: “I sang in the school choir and knew how to listen for harmony and counterpoint, and it was clear to me that the Beatles were something extraordinarily clever. It bewildered me that no one else could hear it: impossible harmonies and part playing you had never heard in pop songs before. The Beatles were obviously just putting all this stuff in for some secret fun of their own, and it seemed exciting to me that people could have fun in that way.”