Say "knock knock"

We have a new game that is giving SayHowAreYouToday a run for it's money....

knock knock jokes

It goes something like this:
Parker: "Isayknockknockyousaywho'sthere.KnockKnock.
me: "Knock knock"
Parker: "Nooooooo!!!!!! I say knock knock you say who's there! Knock knock."
me: "who's there"
Parker: "Banana"
me: "banana who?"
Parker: "Uuummmmm Banana is yellow I ate it all up!!! Isayknockknockyousay who's there."

And this loop repeats itself indefinitely.
The variation today was
"Only I say who's there. Say knockknock"
Me: who's there
Parker: "Noooo!! Only I say who's there. Say knockknock"
etc, etc