Do you know that a Horror movie's objective is to bring out  physiological reaction, such as an elevated heartbeat?
Now that you say it, Why do people want to be scared, why are horror movies created anyway?
these movies overlap with the fantasy, supernatural fiction
I just don't understand why people want to go through it. When was the first ever horror movie created?
I'm not really sure, but I guess why these movies are made is  just to  evoke viewers' nightmares, fears, revulsions and terror of the unknown so that people can be better prepared