The word entertain is often used to mean fun and humor, but many entertainments have serious purposes, like a religious festival or satire. The experience of entertainment stimulates the brain to realease seratonin, dopamine and other chemicals that give us a good feeling. Entertainment also hits on the themes the brain was evolved to deeply react to, in order to understand the social world. This is why so much of entertaintment deals with backstabbing, murders and other themes in the social world. One of the most famous examples is Scheherazade, a story in the Persian professional storytelling tradition that was later used to inspire musical compositions by Rimsky-Korsakov and Ravel, a film by Pasolini and an innovative video game.