"Knock Knock - Yukon" joke

Knock Knock
Who's there!
Yukon!
Yukon who?
Yukon go away and come back at a reasonable time! Knock Knock
Who's there!
Yukon!
Yukon who?
Yukon fool some of the people some of the time. ..!Knock Knock
Who's there!
Yukon!
Yukon who?
Yukon lead a horse to water, but you can't make it drink! Knock Knock
Who's there!
Yukon!
Yukon who?
Yukon say that again!