One of the most precious commodities on an airplane is space.
Space for bags, space for armrests, space for legs, space to put your laptop down so you can comfortably work –– the list goes on. And sometimes, people's idea of "personal space" can differ wildly.
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Imagine you're in this scenario: You board a plane. Your seat is at the end of a row (either the aisle or window). You settle in, and the next person comes in and sits in the middle seat. The doors close and you notice something truly magical: the third seat is open.