Knock Knock
Who's there?
Theresa!
Theresa who?
Theresa fly in my soup!

Knock Knock
Who's there?
Therese!
Therese who?
Therese many a slip twixt the cup and the lip!

Knock Knock
Who's there?
Thermos!
Thermos who?
Thermos be a better way!

Knock Knock
Who's there?
Theron!
Theron who?
Therinheit or Centigrade, I always get mixed up!

Knock Knock
Who's there?
Thomas!
Thomas who?
Thomas happy fella!