Answer:
You use me between your head and your toes the more I work the thinner I grow.
What is so delicate that saying its name breaks it?
I am the place to turn to when nature calls. What am I?
I am a certain five-letter word and become shorter when you add two letters to me. What am I?
I am a nut with a hole
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.