Horror has been a genre since the beginning of cinema, all the way back to the days of silent films. I don't think it will ever go away because it's so universal. Humor doesn't always travel to other countries, but horror does.
When I was a young girl, I lost a lot of weight over one summer - involuntarily - and was just really depressed and sad. There was nothing I could do to gain weight. I would look in the mirror and call myself disgusting every day.