As for me... when I'm sad, I don't try to be happy. I try to become more sad, and keep being sad. Must be a malfunction in my brain.

@luxiongmaoxue Nope, is not malfunction. Is your own surroundings (neighbourhood) and its influence. (I hope I said it right!)

@neutrinoP Well, it's the environment, but I'm sure there's something going wrong with my though process as well.