Entertaining is a form of play that enables us to experience the world around us. It stimulates the brain to realease seratonin and dopamine. It also hits on themes that the brain was evolved to deeply react to, such as social backstabbing and murders. Many forms of entertainment are timeless, and the same ideas resurface repeatedly across different media. However, what is entertaining to one group may not be entertaining to another, and what is considered entertainment can be viewed as cruel or work by others. From Middle English entretenement (“support, maintenance”); see entertain. Also tenere, from the Indo-European root ten.