I got to thinking about the 4th Wall a while back,and I realized that if a character breaks the fourth wall and there is an imaginary audiance reading the story,then the imaginary audiance must be contained by another wall. The 5th Wall.
If the imaginary audiance breaks the 5th wall,and if there is another imaginary audiance,then the 6th Wall comes up. And so on. I call it the 5th Wall Principle.
A good example is the TV Tropes
the Tv show story. The imaginary audiance is interacting with characters who broke the fourth wall,but that audiance isn't aware that they are a part
of the story,so they have to be contained by another wall.
An alternative view is that the characters never broke the 4th Wall and it just expanded to contain the imaginary audiance. But then you have to ask what was containing the audiance before the characters broke the 4th wall.
Whenever there is another layer beyond the story where the 4th Wall is broken,and those characters are unaware they are part of a story,there is another wall.
This is the 5th Wall principle.