Since Tolkien's world is set in a vague time corresponding to our own Middle Ages, I don't get a sense of of their needing or even understanding the concept of "fiction". All of their tales and songs were based on their own history. (OK, maybe they embellished things a bit.)
Maybe they might have had some kinds of moralistic fables or tales to explain concepts or teach children, but that seems more like something Men or Hobbits might have done.
Besides, why would they need fiction? They were living the Story! And since they're immortal, there was always someone around who could confirm the details. [img]smilies/smile.gif[/img]
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