Answer:
What is it that you ought to keep after you have given it to someone else?
What is it that given one, you'll have either two or none?
Angels and pilots earn these.
It could make arrows fly and kites soar. What is it?
This is the main ingredient in spaghetti and Mac-N-Cheese.
If you can spot one of these eastern warriors, it means they're not doing their job right.