In The Great Uprising of the Fops (London, 1747), it became imperative for loyal upper-class citizens not to be *quite* perfectly dressed. The actual epitome of perfection was the sign of the rebels. So, the loyalists adopted the custom of not buttoning the bottom button. When the Uprising was quashed, everyone who buttoned them all was brutally slaughtered by having their lace confiscated (rendering life impossible, of course).
Just remember: The winners not only write the *history* books, they write the *etiquette* books, too.