[George is putting out Nana for the night and he leashes her with a rope to her doghouse. She look at him sadly]

Dash it all, Nana, don't look at me like that. It's nothing personal. It's just that... Well, you're not really a nurse at all. You're, well, a dog. And the children aren't puppies. They're people. And sooner or later, Nana, people have to grow up.