Burglars
The girls have somehow learned about burglars, and so of course are scared of them. They now pepper us with all sorts of interesting questions about them at bedtime. How do they get in? Do they steal children? Will they come into our house?
When I answered "no" to the last question, my youngest asked, and this is verbatim, "Is that because you'll cut them up and throw them in a hole?" Yikes! More yikes-worthy is that I actually wanted to answer yes for a second, so as to appear as the Conqueror Dad to them. But I quickly came to my senses and merely told them, "I promise burglars won't come into our house. You don't have to worry."
It's kind of a lie. I can't promise that. But what are you gonna do?