Answer:
The more you take the more you leave behind. What am I?
What can be as big as an elephant but weighs nothing?
I am just two and two. I am hot. I am cold. I am the parent of numbers that cannot be told. I am a gift beyond measure a matter of course. I am given with pleasure when taken by force.
What gets sharper the more you use it?
A move made popular by the King of Pop.
No matter how little or how much you use me, you change me every month.