They presented male employers with identical job applicants—same experience, same qualifications, same resume—except one was named Dave and the other Diane. Then men in traditional marriages rated “Diane” significantly lower than Dave. Because, you know, vagina. Every woman has felt that—that moment when you can see a man’s engagement switch off, and realize that he will never take you as seriously as he would if you came back with a chest-merkin and a handlebar mustache. But it’s an almost impossible feeling to quantify, and an even harder one to communicate to people who have never felt it. An argument that can be vaporized with an emphatic enough “nu uh!” is a difficult argument to win.