Answer:
What can run but never walks licks but never talks has a bed but never sleeps has a mouth but never eats?
I go through a door but never go in and never come out.
I am the signature stroll of ducks and penguins
My first two letters say my name. My last letter asks a question. What I embrace I destroy.
I can be driven but have no wheels. I can be sliced but still remains whole
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.