Answer:
What asks but never answers?
I am bought by the yard but worn by the foot
I always have to work with something in my eye.
I never was but always will be. No one ever saw me but everyone knows I exist. I give people the motivation to better themselves everyday
I take off my clothes when you put on your clothes. I put on my clothes when you take off your clothes
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?