Answer:
Whipping one of these out in the wrong setting is said to be terrible luck.
What goes up but never comes down?
What freezes after it is heated up?
They are two brothers. However much they run, they do not reach each other.
What has to be broken before you can use it?
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.