Answer:
Three little letters, a paradox to some. The worse that it is, the better it becomes.
What has two legs but doesn't walk?
The eight of us move forth and back. To protect our king from the foes attack.
Fatherless and motherless. Born without sin, roared when it came into the world. And never spoke again.
No matter how little or how much you use me, you change me every month.
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.