Answer:
I travel with deer all over the world and make the night special for all boys and girls. I happily drink milk and eat your cookies and then I give you all sorts of goodies. Who am I?
A man without bones whose flesh is cold. A man unthinking who is always shrinking. Who is he?
What never ends but you always have it
What is yours but only used by others?
Small and bearded, both in the real world and in stories.
you hold my tail while I fish for you