Because she had no arms. Knock, knock. Who's there? Not Susie.
To get to your house... Knock, knock. Who's there? The chicken.
Because she had no arms. Knock, knock! (Who's there) Well, it ain't Mary.
2 - Because she had no arms 1 - Knock Knock 2 - Who's there 1 - Not Susie
Because she has no arms! Knock knock. Who's there Not Susie!