I f you’re a straight woman looking for love in your thirties, you have to find a man whose light is on. That’s the theory posited by Miranda in Sex and the City , who explained her now-infamous thesis in an episode of season three: “It’s not fate, his light is on, that’s all”, she explains to Charlotte, who is convinced her relationship with Trey was written in the stars. “ Men are like cabs ; when they’re available, their light goes on,” Miranda continues. “They wake up one day, and they decide they’re ready to settle down, have babies, whatever, then they turn their light on.” The idea is then that whoever that man happens to meet next will wind up becoming his wife. It sounds simple, insulting even. Surely, commitment is built over time? Romantic love is more complicated than a silly metaphor! There is more to men than a light flicking on in their brains and marrying whoever they happen to meet next.…