Answer:
When I live I cry if you don't kill me I'll die.
I have Eighty-eight keys but cannot open a single door.
I am made by nature soft as silk; A puffy cloud white as milk; Snow tops this tropical crop; The dirtiest part of a mop.
When you stop and look you can always see me. If you try to touch you cannot feel me. I cannot move but as you near me I will move away from you.
I drive men mad for love of me, easily beaten, never free. What am I?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.