Answer:
I widen my jaws when you poke two fingers in me. I especially like to devour papers
The shorter I am, the bigger I am. What am I?
I have thirteen hearts but no body or soul. What am I?
I can be entertaining until you realize some pieces have been lost.
There are four of us but it seems like everyone loves spades the most.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.