The younger grandson, Klynton, four, has got in the habit recently of thrusting his hands in my trouser pockets and tearing up and throwing away whatever he finds there. He goes about it with energy and application, snarling and growling like a lion, and it’s bloody annoying. Because he is impervious to physical pain, a smart cuff around the cranium only makes him press his attack more violently, like a brave bull ‘insisting’ against a picador’s lance.