About four days in to it she modified “butt” to “booty” because it sounded better. You know what? Chicken booty!
The joke evolved into whatever she was looking at at the moment. You know what? Picture booty! You know what? Door booty!
At week three of the joke we reached the compound phase in which whatever was funniest to her at the moment, such as a topic, plus whatever she was looking at, plus booty. You know what? Warm candy booty. You know what? Big zombie booty.
That is all