For the past 6 months my son has been trying to tell this joke and can't quite get it right.
A:- Knock Knock
B:- Who's there?
A:- Yah
B:- Yah who
A:- Yahoo - I didn't know you were a cowboy!!!
Okay, to help visualise how this joke gets told here's another one he has tried telling.
A:- Knock Knock who's there?
B:- Er.... Who's there?
A:- Boo Hoo. Aw, no need to cry!
See what I mean.