Answer:
the only amusing part of the body
Flat as a leaf round as a ring. I have two eyes but can't see a thing.
I am clean when Iām black dirty when Iām white.
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.
No matter how much rain gets on me, I won't get any wetter. What am I?
What an fill a room but takes up no space?