When I was a little kid, I read a magazine called Highlights for Children. One issue told the story of the man and the satyr. The story went something like this: A man and a satyr met one night deep in the forest. The man invited the satyr to share the warmth of his fire and some soup. As the soup was heating, the man cupped his hands and blew into them. The satyr asked why he had done this. “To warm my hands,” the man said. Then, as they prepared to eat their soup, the satyr saw the man blowing on his soup. Again, the satyr asked why he had done this. “To cool my soup,” the man said. The satyr nodded, then said, “What a strange creature is Man, who can blow hot and cold with the same breath.” Apparently the satyr had never heard of the Second Law of Thermodynamics.