Answer:
It's like food but water kills it. What is it?
In we go, out we go. All around and in a row. Always, always steady flow. When we'll stop, you'll never known. In we go, out we go.
My first is high, My second damp, My whole a tie, A writer's cramp
Only two backbones and thousands of ribs.
What letter comes next: O T T F F S S ?
What sphinxes employ and players enjoy.