Answer:
Brown I am and much admired; many horses have I tried; tire a horse and worry a man; tell me this riddle if you can.
Take one out and scratch my head, I am now black but once was red.
Pirates put their booty in it.
What an fill a room but takes up no space?
I count time, but have no end. Tick tick, but I am not a clock. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?