You don't let her out.
They have no hands to knock on the door.
They have in-door fins
Eric Clapton would absolutely NEVER let an ounce of cociane fall 49 stories out a window onto the streets of New York.
A: He couldn't part with it.
A: She's got no arms Me: Knock Knock Them: Whose there Me: Not Lucy.
Because she had no arms. Knock, knock! (Who's there ) Well, it ain't Mary.