“There used to be a door here, but I can’t smell it!”
Mister Smitty tackles the mysterious disappearance of the sliding glass door.
With the screen door, no problemo: he can smell the inside of the house through it.
(“Go into the smell” – old cat saying.)
But when the sliding glass door is slideded-in-place, the magically smelly opening disappears into thin air
-- like some Ali Baba “Close sesame” kine thing, the door disappears!