Nobody asks, 'who's there ' when you try and tell a knock knock joke.
He was trying to find Winnie the Pooh.
He was trying to heel them.
Oops, this was supposed to be for. There's no punch line!
The test subject is the only one you'd willingly ask to "tell us about yourself."
Four different answers
Because it would be really awkward asking what their handicap was.
Because it means urine trouble
The punch lines.
Knock knock knock... excuse me sir, but do you have a few minutes to discuss nothing
Work smarter not harder people.
That I will open the door
Because freedom rings.
Two wee chaps