Rue du Faubourg Saint-Honore is a narrow, mile-long thoroughfare lined with boutiques like Chanel, Prada, and Cartier. It's the most fashionable street in Paris, the most fashionable place on earth. It's where travel budgets go to die (happily). On a vacation with my wife last fall, I landed in the street's Hermes flagship store. Ordinarily I'm a frugal guy. My purchases are largely utilitarian. But I'd just capped off a banner year at work, and it felt empowering to waltz into one of Paris's most exclusive boutiques to treat myself to a bonus in the form of a $200 necktie.I spent half an hour perusing the color-coordinated wall of neckwear, settling on a fiery-red pattern stamped