Answer:
My teeth are sharp, my back is straight, to cut things up it is my fate.
What I am filled, I can point the way. When I am empty. Nothing moves me. I have two skins. One without and one within.
My first is high, My second damp, My whole a tie, A writer's cramp
A word I know, six letters it contains. Subtract just one and twelve remains.
A doctor might remove one from the neck of a Dracula victim.
What do ghost serve for dessert?