Answer:
The person who makes me doesn't need me. The person who buys me doesn't use me. The person who uses me doesn't know it. What am I?
What type of dress can never be worn?
Two bodies have I, though both joined in one. The more I stand still the faster I run. What am I?
lighter than feather and softer than silk yet the strongest man in the world cannot hold me for more than a few minutes.
Part carbon, part water, I am poison to the fishes. Many falsely claim my name, I am the pause that refreshes. What am I?
No matter how little or how much you use me, you change me every month.