Answer:
My teeth are sharp, my back is straight, to cut things up it is my fate.
Of no use to one, Bliss to two. Men lie for it. The baby’s right,
When I’m metal or wood, I help you get home. When I’m flesh and I’m blood, In the darkness I roam.
A blind man enters a maze, and the entrance closes behind him. His only way out is to solve the maze. A long time passes, and he exits the maze through the correct exit. How did he solve the maze?
What can run but can’t walk?
If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?