Once upon a time there was an emperor whose only interest in life was to dress up in fashionable clothes. He kept changing his clothes so that people could admire him.
Once, two thieves decided to teach him a lesson.
They told the emperor that they were very fine tailors and could sew a lovely new suit for him. It would be so light and fine that it would seem invisible. Only those who were stupid could not see it. The emperor was very excited and ordered the new tailors to begin their work.