You know, one of the worst experiences of my adult life was feeding my father spoonsful of yoghurt in hospital and watching it dribble out of his mouth again. (He didn't have cancer; he'd had a stroke.) I didn't like him, never did, but it's a fact that he was a highly successful businessman, good at almost everything he did - other than getting on with his family - very much respected by his peers, and even after he…