Answer:
I work when I play and play when I work.
I have legs but walk not, a strong back but work not. Two good arms but reach not. A seat but sit and tarry not.
It's usually found dried, but often kept slicker. Above another need, it's said to be thicker. What is it?
My teeth are sharp, my back is straight, to cut things up it is my fate.
What is never used unless it's in a tight place?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?