Answer:
I am perfect with a head perfect without a head; Perfect with a tail perfect without a tail; Perfect with either neither or both.
Part carbon part water I am poison to the fishes. Many falsely claim my name I am the pause that refreshes.
What has no beginning, end, or middle?
I am always around you but often forgotten. I am pure and clean most time but occasionally rotten.
I am gentle enough to soothe your skin, light enough to fly in the sky, strong enough to crack rocks. What am I?
A little house full of meat, no door to go in and eat.