Answer:
What is eaten but not grown and was born in water but will disappear if soaked?
I open wide and tight I shut, Sharp am I and paper-cut fingers too, so do take care, I'm good and bad, so best beware.
What begins and has no end? What is the ending of all that begins?
You need a key to receive an answer from me. The answer you'll find is straight from your mind. What is it?
What is it something that you always have but you always leave behind?
I am your mother's brother's only brother in law. Who am I?