Knock Knock
Who's there?
Mortimor!
Mortimor who?
Mortimor that meets the eye!

Knock Knock
Who's there?
Mozart!
Mozart who?
Mozart is in museums!

Knock Knock
Who's there?
Mr!
Mr who!
Missed her at the bus stop!

Knock Knock
Who's there?
Muffin!
Muffin who?
Muffin the matter with me, how about you?

Knock Knock
Who's there?
Muffin!
Muffin who?
Muffin grouchy first thing in the morning!