Answer:
The little pink nub that helps rectify mistakes.
What starts with a P, ends with an E and has a million letters in it?
What smells the most in the kitchen?
I'm a ring of sliced onion dipped in batter and then deep fried.
What can go up but never come down?
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.