“Post coitum omne animal triste,” he said, leaning over to put a hand, for a moment, on the young man’s shoulder. “That’s Aristotle.” “What, sir?” Augustus asked. “I expect that’s Latin, but what does it mean?” “ ‘After copulation every animal is sad,’ ” the Captain said. “It’s true, too—though who can say why? The seed flies, and the seeder feels blue.”