Answer:
What is the thing that stays the same size, but the more it's used the more it decreases?
I make you weak at the worst of all times. I keep you safe, I keep you fine. I make your hands sweat. And your heart grow cold. I visit the weak, but seldom the bold.
What has 13 hearts but none beat?
You heart it speak, for it has a hard tongue. But it cannot breathe, for it has not a lung.
What can you catch but not throw?
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.