Answer:
I eat I live.I breathe I live. I drink I die.
To you, rude would I never be, though I flag my tongue for all to see. What am I?
What gets whiter the dirtier it gets?
My teeth are sharp my back is straight to cut things up it is my fate.
I drive men mad for love of me, easily beaten, never free. What am I?
No matter how little or how much you use me, you change me every month.