Answer:
The more you take of me the more you leave behind.
I have two bodies joined together as one. When standing still, I run and run. What am I?
If you break me, I'll not stop working. If you can touch me, my work is done. What am I?
I am a key that is playful. What am I?
A young man wants to have me but when he has me, he no longer wants me. What am I?
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.