Valentine's Day: Love it if you receive "the perfect gift". Hate it if you don't know what gift to give or where to find it. If you're the latter, it's not all your fault, says Adrian Drury at Ovum: "You may not know what to buy your loved one, but your retailer does." As a game-changer holiday, Feb. 14 poses a double-edge relationship sword for retailers. Fail to help a consumer express their love, and that consumer will not love your brand. Why is this so difficult? Because of a sea change of customer buying behavior, says SAP's Jon Wurfl. Consider 37% of PriceGrabber® Valentine's Day Shopping Survey respondents who shop online or via mobile phone or tablet. And gender, age, generational and ethnic preferences of each customer, plus brand reputation word-of-mouth on social media. If you aspire to author Becky Carroll's gold standard - the Customers Rock company - pour a cup of Joe, Earl or OJ and join us for a Valentine's Day Post-Mortem: Are you a retailer we love to love?