A Kiss Before BuyingOn one summer day each year, Andy Koehn becomes a veritable kissing bandit. Of course, the owner of Koehn & Koehn Jewelers in West Bend, Wis., has some standards: He puckers up only for good clients, and the smooches get more robust depending on the frequency of their purchases. The occasion for the lovefest? The 80-year-old store’s annual August Kiss & Tell event.“I call them ‘kisses,’ but it’s a discount,” says Koehn. “It’s the only day all year where we mark down jewelry.” And the markdowns are as unique as the customers—all strictly invited guests with scheduled appointments. (The sale isn’t advertised.)“It’s not just a percentage off,” explains Koehn. “It’s a very individual thing based on volume that day and how old a piece is. The heavier the traffic and the older the jewelry, the steeper the discount.” Of course, it’