Answer:
My teeth are sharp, my back is straight, to cut things up it is my fate.
It is the electronic version of junk mail or a salty meat in a can.
What goes around the world and stays in a corner?
What is weightless but it needs two person to hold it?
You can spin, wheel and twist, but this thing can turn without moving. What is it?
What did the piece of wood say when he saw the screwdriver and screws approaching?