If you don't give a penny, the monkey dies and asks for a replacement when you see the king of hell. Wang said, "If you want to be a man, you need to pull out all your hair." Then he told Hag to pluck

If you don't give a penny, the monkey dies and asks for a replacement when you see the king of hell. Wang said, "If you want to be a man, you need to pull out all your hair." Then he told Hag to pluck the monkey's hair. Pull one and the monkey will be invincible. A monkey died and went to visit hades. He asked to be reincarnated. Hades said, "Since you want to be a human being, you must pull out all your hair." Then he summoned a witch to pick one. Monkeys can't stand pain. Hades smiled and said, "How can you be a man if you refuse to pull out a hair?" Later, people used "penniless" to describe a very selfish and stingy person.