It would be unfair to say that the trench coat is back, since it never really went away. But there’s something in the air (or the water cooler) at GQ HQ right now, because each morning, a who’s who of my colleagues arrive at work wrapped in their trenches, protecting their big fits from the elements. Sometimes, it turns out, the best answer to the question every menswear nerd must contend with during the topsy-turvy days of spring—what the heck should I wear today?—is the simplest: a…

