Answer:
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once I've told you all, I cannot tell you more. What am I?
What comes once in a minute twice in a moment but never in a thousand years?
I suck.
You cannot keep me until you have given me. What am I?
In a tunnel of darkness lies a beast or iron. It can only attack when pulled back. What is it?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?