Answer:
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it can neither see nor feel it. What is it?
Take one out and scratch my head, I am now black but once was red.
Take off my skin, I won't cry, but you will.
What goes in the water red, and comes out black?
What is it that no man ever yet did see, which never was, but always is to be?
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?