There is an object on earth that behaves in a curious manner.
It gets bigger the more you take out of it and smaller the more you put into it.
What is it?
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It is a
As you remove material (like dirt for example) the hole gets larger; as you add material, it gets smaller.
The more money you take out of an account that is in debt, the more you will owe. If you owe more money, than the debt is larger. Likewise, if you put more money into the account in debt, the smaller the debt will be.