Answer:
What can go up but never come down?
What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?
The little pink nub that helps rectify mistakes.
We are two brothers on opposite sides of the road, but we never see each other. Who are we?
You can't keep this until you have given it. What is it?
It is an insect, and the first part of its name is the name of another insect. What is it?