It started long ago. There was this king, and if anyone in his kingdom broke the law, he had a specific punishment. He would put the person in an arena and made him choose between 2 doors. One door had a beautiful lady behind it that he would marry. The other one had a tiger behind it.
One time this young courtier started courting the King's daughter. As a punishment, the king put the guy in the arena. Then he went out and found the largest tiger and the most beautiful woman. The princess, who loved the courtier, helped him and uses her power to find out which door does the tiger hide and which did the beautiful woman did. The story ends when the princess points at the door on the right side.