Answer:
I ask no questions but receive a lot of answers. What am I?
The more you take, the more you leave behind. What are they?
Of these things - I have two. One for me - and one for you. And when you ask about the price I simply smile and nod twice.
I look at you, you look at me. I raise my right, you raise your left. What am I?
What has a head and a tail but no body?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.