Answer:
I sit in a corner while travelling around the world.
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. What am I?
I go up and never come down no matter how hard you wish. As I get higher more wrinkles crawl onto your face.
I come without being fetched at night hides away as soon as daylight strikes. Although I may look small I am much mightier than what you can imagine.
Find me on body builders or in the drink aisle.
I flow from the Homerβs mouth when he sees doughnuts.