Perhaps this is the door they use when they pour hot oil on hostile attackers. Or, maybe it is the escape route of last resort in the event of a home invasion. More likely, there was once a balcony that has since been removed. But, why did they leave the door and screen door in place?
My guess is that, during the hot summer months the upper floor needs ventilation, so the screen door serves that purpose. I just hope they have some way to prevent accidents.
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