So I was in Sainsbury’s, Swansea Marina, hard at another well-deserved sandwich when one of life’s annoying little cameos developed in front of me.  Why is it that some people insist on sitting at a dirty and un-cleared table rather than find another one which is ready for occupation? Anyway, a wife who was very much in charge, sat husband down amongst somebody else’s dirty crockery and then proceeded to complain many times about the dirty table. Eventually the husband, in…