If “Sex and the City” had given us nothing else, it’s incontrovertible that it served the best fashion. Fortunately, it gave us so much more and we’re exploring that in this week’s “Extra Sugar.” SATC said: be fabulous, be broke, be late, be complicated—and somehow make it iconic. Was it realistic? Absolutely not. Was it influential? So ab-so-duck-ing-lute-ly influential we’re still talking about it.  Regrettably, I (Nikki) found this piece after I put this segment together,