Answer:
What is the building that you leave without ever having entered.
idk
A man wants to buy a used car. He finds a beautiful Buick for $9500, but he buys it without paying a dime. How did he manage this?
The more that there is of this, the less you see. What is it?
What always comes into a house through the keyhole?
By Moon or by Sun, I shall be found. Yet I am undone, if there's no light around