Why do people like to scare them self ?

There are many horror book fans i am one of them, even though i like myth better.
there are lots of horror book authors to like Poe, Stephen king, and many more.
I had asked why people like to scare them self? well i think this is because people like the suspense,
the thing that is hiding in the closet, or around the corrner,and yes even under the bed. Or maybe its the
part of people's minds that can relate to the big bad thing waiting in a good story. like Hannibal lector, Regen from the exorcist, or any of the other bad guys in these types of story's. I know i like them because its better then reality cause in the book its fake but in the real world some of the stuff really happens. they way it rips you along to page after page in tell the very end. even then though maybe some people are trying to fathom how people can be so twisted to commit these action. These are the many reasons why i think people try to scar themselves because of they feel they must or because its fun actually really fun.