Answer:
Metal or bone I may be, many teeth I have and always bared. Yet my bite harms no one. And ladies delight in my touch.
Although my cow is dead, I still beat herΒ What a racket she makes.
Without a bridle, or a saddle, across a thing I ride a-straddle. And those I ride, by help of me, though almost blind, are made to see.
What zips through the sky with a tail of fire and dust. It could be an omen, its origin to discuss?
If you have it, you want to share it. If you share it, you don't have it.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?