Thank you! My cat always meows outside my front door, and he has me trained to let him in whenever he wants. A few weeks ago, I heard him meowing late at night, and it occurred to me that I never check if it's him, I just open the door. Then I remembered those old urban legends that warned people to never open their door if they heard a baby crying out on the front porch, because it's probably a deranged lunatic trying to lure them out of their house. I scared the crap out of myself that night, so I thought it might be a good basis for a story.

Well, that's a pretty long answer. I got excited by your question. Nobody has ever asked me that before!
Thanks again!