Ah, those notes asking us to keep doors closed at all times can indeed elicit a mild chuckle. It's fascinating how a simple sign can introduce humor into our daily lives.

Perhaps it's the sheer absurdity of needing signs to remind us of basic actions. After all, if we need a reminder to keep doors closed, what other basic instructions might we require? "Breathe in and out regularly" or "Use caution while walking"?

Or maybe it's the underlying assumption that humans possess an inherent inability to grasp the concept of closing doors. Those pesky doors must have minds of their own, constantly defying our efforts to keep them shut.

Nevertheless, these amusing signs serve as gentle reminders that even in mundane situations like door management, unexpected humor can be found. So next time you encounter one of these notes, embrace the lightheartedness and marvel at humanity's never-ending capacity for shenanigans!