John can't wait for the bubbies to be big enough for "rough play". In his mind, that's what he's here for, right? "They're boys...they want to tackle and growl and wrestle!" [Thompson, John, 2009]. Well, I suspect this is just the first step to his dreamed "rough play". See airplane fun below.
John: "Okay boys, when doing 'airplane' you must remember the rule...no drool!" Parker is taking the rules seriously!