In 1948, Vogue published its 658-page Book of Etiquette, compiled by editor Millicent Fenwick, featuring how-tos, dos and don’ts, and the proper politesse for a remarkably varied set of scenarios. But as Fenwick writes in the introduction: “Etiquette is based on tradition, and yet it can change.” Some 75 years later, Oh, Behave! is a new monthly Vogue column in which experts sound off on today’s ever-evolving social etiquette.

Headlines about crumbling decorum at 30,000 feet are nothing new, and midair horror stories are all too familiar—armrest wars, barefoot wanderers, mystery smells. As the summer travel season barrels toward its grand finale over Labor Day weekend, a reminder of how to behave in the skies feels not just timely, but urgent.

This month’s Oh, Behave! etiquet

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