Being a clergyman has a curious Gilbert and Sullivan feeling about it, especially at Christmas. Like Father Christmas we dress in colourful and impractical clothes (how long would his fur stay white up and down chimneys?) and move around to music that is not otherwise sung. There is a sort of unwritten code in some churches that you should not look too much as if you are enjoying yourself, but being at a cathedral is fun because during December it tends to fill up several times over.
