Sad Movies

You know that sad movie that really tugs your heart in the right way? I see them every so often, where the main character dies, or loses his/her girlfriend/boyfriend, and it's really sad, but makes the movie great. And I think it's good to have that kind of emotion every so often, taking over from the usual Hollywood endings, but aside from relief, I wonder how sad it would have to be to become unwatchable/unreadable. I know of certain films and books that really hit hard, and become difficult to watch or read, but afterwards, you do feel satisfied with the story.

I read something today that didn't have that quality. It was too sad to read, and having read part of it, I feel much worse than before I read it. I regret reading it. That isn't on the merit of writing, that is on that the content is too sad for me to deal with, and had I read all of it I would be in a worse position.

I haven't had that before.