Answer:
I can be thin but not fat; in your body but never on your placemat. I'm always better when I'm fresh but you'll never see me in the flesh.
You see a boat filled with people. It has not sunk but when you look again you don't see a single person on the boat. Why?
What is black when you buy it red when you use it and gray when you throw it away?
A piece of paper that takes most people 3 or 4 years to get.
I am a shimmering field that reaches far. Yet I have no tracks and am crossed without paths.
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk