Answer: my answer
Explanation: Maybe its the wanting of the brain to know what you could summon up in your head. Or maybe it's the unfolding of the new images that appear on your character. Why do some brains enjoy fear? Could it just be the opening to a new experience that you'd have to extract out of your head when you're finished watching "IT"? No, it's simply the excitement of the little demon inside you trying to get a little nip of its well known surroundence. It wants it so it shall have it, laugh becuase that's what it desires.