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.
A dragons tooth in a mortals hand I kill I maim I divide the land.
I live off of a busy street. If you want, you can stay for an hour or two. But if you don't pay rent, I'll tell on you. What am I?
In the sun I like to play; in the rain I goes away; walk or run I always follow; in the mud I always wallow.
I am two-faced but bear only one. I have no legs but travel widely. Men spill much blood over me. Kings leave their imprint on me. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?