Answer:
I am your mother's brother's only brother in law. Who am I?
A young man wants to have it, but when he has it he no longer wants it. Blade in hand he attacks it And does his best to remove it. Yet he knows that it is all in vain.
What occurs four times in every week, twice in every month, only once in a year but never in a day?
Makes dough grow
It is in every mountain, it's not in any hill, it's not in all the world, and yet it's in the mill.
Pirates put their booty in it.