Horror films are scary. And scary isn’t an emotion we’re intended to experience regularly. It’s evolutionary purpose is to tell us that something really bad is going down right now and we really need to cop ourselves on in order to deal with it. It’s meant to make our adrenaline flow, and our hair stand up – it’s meant to keep us on the edge and stop us feeling comfortable. So, why do we take such great joy in experiencing that abstract terror, the suspense and the horror of scary movies? Surely

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