Why Horror?

It’s been a while since I last posted, and much has happened in that time. I’m currently writing my thesis for my MA in Literature and Creative Writing. It’s a collection of short stories that will be accompanied by a critical essay, and in this essay I have to explore why I write what I write. The questions I’m thinking about now, and I’d love to hear people’s answers to, are why do we write horror? Why not tell the same story in another genre? Or can horror stories be told in any other genre? I’d love to hear your thoughts…