Answer:
you cannot keep me until you have given me
I am known for my natural tuxedo and marching
I will disappear every time you say my name.
You seek me out when your hunger's ripe. I sit on four legs and smoke a pipe.
Tear me off and scratch my head what once red is now black.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?