Entertaiment is the act of holding and keeping the attention of an audience. It may be an idea or a task, but it is more likely one of the activities that have developed over thousands of years specifically for the purpose of entertaining. It is a way to give pleasure and delight, and often hits on themes that the brain was evolved to react deeply to such as backstabbing, murder and other social situations. It also stimulates the brain to realease seratonin and dopamine.