"So I started thinking...imagine going to sleep and you hear a voice saying 'one day I will control your-MY brain. And I will kill you. I will' what if the other head killed him?"
He said it was whispering. As far as I can tell, nobody else heard it. It could be what the above person said, or maybe he was simply imagining it. I would have all sorts of nightmares if I had a face at the back of my head.
Newest Batman villain?
Also, people have a part of their brain that distinguishes between their own thoughts and what their ears perceive. I've wondered if those who have a badly developed *whatever the thing is that does this* are the ones who "hear voices" because they can't distinguish between thoughts we all have ("Punch that jerk in the mouth") and someone else telling them that.
http://www.thehumanmarvels.com/from-the-archives-edward-mordake-poor-edward/
Also, people have a part of their brain that distinguishes between their own thoughts and what their ears perceive. I've wondered if those who have a badly developed *whatever the thing is that does this* are the ones who "hear voices" because they can't distinguish between thoughts we all have ("Punch that jerk in the mouth") and someone else telling them that.