Answer:
So simple, that I can only point. Yet I guide men all over the world.
I will disappear every time you say my name.
I am the place to turn when nature calls.
What is the difference between a poorly dressed man on a bike, and a well-dressed man on a unicycle?
My teeth are sharp my back is straight to cut things up it is my fate.
A little house full of meat, no door to go in and eat.