Dowd, the award-winning New York Times columnist, is promoting her new book, “Are Men Necessary?” Of course, Dowd doesn’t think so. Which is fortunate for her, since she also believes we’re going away. “There’s a body of evidence now that the Y chromosome is rotting at such a fast rate that it will go out of business in about 100,000 years,” Dowd said recently on CNN. “Now that women don’t need men to reproduce and refinance, the question is, will we keep you around?”