"Perhaps you have heart disease," said the Tin Woodman.
"It may be," said the Lion.
"If you have," continued the Tin Woodman, "you ought to be glad, for it proves you have a heart. For my part, I have no heart; so I cannot have heart disease."
"Perhaps," said the Lion thoughtfully, "if I had no heart I should not be a coward."
"Have you brains?" asked the Scarecrow.
"I suppose so. I've never looked to see," replied the Lion.
L. Frank Baum: The Wonderful Wizard of Oz