Bypasses are devices which allow some people to drive from point A to point B very fast whilst other people dash from point B to point A very fast. People living at point C, being a point directly in between, are often given to wonder what's so great about point A that so many people of point B are so keen to get there, and what's so great about point B that so many people of point A are so keen to get there. They often wish that people would just once and for all work out where the hell they wanted to be.

Mr Prosser wanted to be at point D. Point D wasn't anywhere in particular, it was just any convenient point a very long way from points A, B and C. He would have a nice little cottage at point D, with axes over the door, and spend a pleasant amount of time at point E, which would be the nearest pub to point D.