I found a dog...
... bedraggled and wandering the rainy streets without an owner. So wet and dirty was it that I couldn't tell what kind of breed it was, never mind where it had come from..
So, I took it home to take care of it and find its owner. I wish I hadn't.
It refused to eat. It refused to sleep. It refused a bath.
It refused to do anything but sit there and ask me these stupid cryptic riddles.
And to make it worse, it wouldn't even tell me the answers until the following morning.
Then it dawned on me.
It was, in fact, a crossword setter.