When a child is born, a father is born. A mother is born, too of course, but at least for her it's a gradual process. Body and soul, she has nine months to get used to what's happening. She becomes what's happening. But for even the best-prepared father, it happens all at once. On the other side of a plate-glass window, a nurse is holding up something roughly the size of a loaf of bread for him to see for the first time.