"It must be inconvenient to be made of flesh," said the Scarecrow thoughtfully, "for you must sleep, and eat and drink. However, you have brains, and it is worth a lot of bother to be able to think properly."
L. Frank BaumBut that isn't right. The King of Beasts shouldn't be a coward,'" said the Scarecrow. 'I know it,' returned the Lion, wiping a tear from his eye with the tip of his tail. 'It is my great sorrow, and makes my life very unhappy. But whenever there is danger, my heart begins to beat fast.' 'Perhaps you have heart disease,' said the Tin Woodman. 'It may be,' said the Lion.
L. Frank Baum