Entertaiment is about the way we feel when we watch sex, backstabbing and murders in tv shows or movies. The brain gets stimulated and realease seratonin and dopamine. The brain was shaped to react deeply to these things in order to survive and navigate in a social world.
The story of Scheherazade, a Persian professional storyteller, is an example of this power of entertainment. It inspired Rimsky-Korsakov, Ravel and Szymanowski to make orchestral works, Pasolini to make a film adaptation, and even an innovative video game. See similar words at the bottom of the page.