Most people are deeply influenced by the music, fashions, and culture they experienced in their teenage years - in fact, brain science confirms that we are particularly susceptible to influence during young adulthood. Meghan Markle's deep attachment to the 1990s was clear this week, when her intro to the Vogue UK issue she guest-edited strongly recalled the narration Carrie Bradshaw read out at the beginning and end of each episode of "Sex in the City." When the show premiered in 1998, Meg was either 17 or 21, depending on which of her birthdates you believe. Dressing like an extra Meg dressed like an extra from "Sex in the City" for most of the following decade - short tight dresses, stiletto heels, long loose hair. And until her engagement to Prince Harry, Meg was regularly sharing Carrie-Charlotte-Miranda-Samantha type images of herself and her girlfriends on exotic vacations, colorful cocktails held high. It could also be argued that both her w...