Gentlemen, we have the technology. We can build the perfect sex companions. But do we want them? David Mills has a great story about the time he brought a date home and she almost saw his sex robot. “Everything was going well, and we were heading toward the bedroom,” he says. “And that’s when I realized, ‘Oh crap, Taffy’s in there!’” Taffy is Mills’s sex robot. He gave her that name because it sounded young and playful. Mills and Taffy are celebrating their two-year anniversary. In June of 2014, Mills had her delivered from a company called Abyss Creations in...