Answer:
People need me yet they give me away every day.
I sleep when you are awake, I am awake when you fall asleep. I can fly but no feathers to aid my flight. What am I?
I am alive without breath and cold as death. I am never thirsty but always drinking. What am I?
Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not. What am I?
What flies without wings?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?