As we are cleaning the basement --
Him: There's a dead mouse.
Me: Then we're moving!
Him: No, we're not moving. We haven't even moved in yet!
Me: I'm not living in a house that has mice!
Him: Every house in the world has a mouse at some time or other.
Me: Then we'll get a cat.
Him: No, we're not getting a cat.
Me: Which would you rather have, a cat or a mouse?
Him: A mouse! You won't let me have a dog, so I'm not going to let you have a cat.
Me: I don't want a cat! I just don't want mice! There's no comparison. With a dog, it's always, "Hey, can you run home and let the dog out?" or "We can't go away for the weekend -- Who would watch the dog?" Cats are way more self-sufficient.
Him: So are mice!
The debate continues.