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?
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
I have a neck and no head two arms but no hands. I go with you to school I go with you to work.
What insect does a blacksmith manufacture?
In Paris but not in France the thinnest of its siblings.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?