Answer:
I widen my jaws when you poke two fingers in me. I especially like to devour papers
I run smoother than any rhyme, I love to fall but cannot climb. What am I?
I go up and never come down no matter how hard you wish. As I get higher more wrinkles crawl onto your face.
What goes through towns and over hills but never moves?
What gets wetter as it dries?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.