Answer:
They keep secrets locked away. And you pass through them each day. For each one there is a key, They respond to sesame.
You are owed one of these when someone wrongs you
What Can Fly Without Wings
When it's dirty this should never be aired in public.
A red house is made out of red bricks. A blue house is made out of blue bricks. What is a green house made out of?
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.