I was recently consulted in the prison in which I work by an inmate who was the proud father of two children. I asked him whether he still saw them: continued contact with their biological offspring being something of a rarity among the imprisoned paternal community. Instead of answering me directly, he rolled up his sleeves and pointed to two tattoos on his forearm, red hearts with scrolls across them bearing the names of his children—two tattoos among many others, needless to say. He hadn’t seen either of his children for years, and had never contributed anything to their upkeep. Indeed, the idea that he should have done so was so completely alien to him and to the mores of the world in which he moved that the thought had never crossed his mind, even fleetingly. By contrast, he obviously believed that his tattoos were a sign of genuine devotion to his children. Their names were engraved, if not on his heart exactly, at least on hearts painfully...