Answer:
What has a head, a tail, is brown, and has no legs?
Often held but never touched. Always wet but never rusts. Often bits but seldom bit. To use it well you must have wit.
I turn around once. What is out will not get in. I turn around again. What is in will not get out.
I am always hungry, I must always be fed. The finger I lick will soon turn red.
We are all around, yet to us you are half blind. Sunlight makes us invisible, and difficult to find
I am free the first time and second time but the third time is going to cost you money.