The Evolutionary Reasons We Are Drawn To Horror Movies and Haunted Houses

Scary play lets people -- and other animals -- rehearse coping skills for disturbing challenges in the real world. Scientific American: Our desire to experience fear, it seems, is rooted deep in our evolutionary past and can still benefit us today. Scary play, it turns out, can help us overcome fears and face new challenges -- those that surface in our own lives and others that arise in the increasingly disturbing world we all live in. The phenomenon of scary play surprised Charles Darwin. In The Descent of Man, he wrote that he had heard about captive monkeys that, despite their fear of snakes, kept lifting the lid of a box containing the reptiles to peek inside. Intrigued, Darwin turned the story into an experiment: He put a bag with a snake inside it in a cage full of monkeys at the London Zoological Gardens. A monkey would cautiously walk up to the bag, slowly open it, and peer down inside before shrieking and racing away. After seeing one monkey do this, another monkey would carefully walk over to the bag to take a peek, then scream and run. Then another would do the same thing, then another.

The monkeys were 'satiating their horror,' as Darwin put it. Morbid fascination with danger is widespread in the animal kingdom -- it's called predator inspection. The inspection occurs when an animal looks at or even approaches a predator rather than simply fleeing. This behavior occurs across a range of animals, from guppies to gazelles. At first blush, getting close to danger seems like a bad idea. Why would natural selection have instilled in animals a curiosity about the very things they should be avoiding? But there is an evolutionary logic to these actions. Morbid curiosity is a powerful way for animals to gain information about the most dangerous things in their environment. It also gives them an opportunity to practice dealing with scary experiences.

When you consider that many prey animals live close to their predators, the benefits of morbidly curious behavior such as predator inspection become clear. For example, it's not uncommon for a gazelle to cross paths with a cheetah on the savanna. It might seem like a gazelle should always run when it sees a cheetah. Fleeing, however, is physiologically expensive; if a gazelle ran every time it saw a cheetah, it would exhaust precious calories and lose out on opportunities for other activities that are important to its survival and reproduction. Consider the perspective of the predator, too. It may seem like a cheetah should chase after a gazelle anytime it sees one. But for a cheetah, it's not easy to just grab a bite; hunting is an energetically costly exercise that doesn't always end in success.

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