Good-time girl Cally Morgenstern has never paid much attention to the robots her father built. That is, until one night when her vibrator runs out of batteries. And hey, if you've got a six-foot hunky robot offering to relieve your sexual frustration, you're not going to say no, right? Even if he is sort of…well, definitely…blue.Cally quickly realizes Blue isn't the average robot. He's rapidly acquiring a personality, for one thing. And an avid interest in human sexuality, particularly when it comes to Cally. She's eager to teach Blue all she knows about sexual pleasure, even if they have to build him a few necessary parts in the process. And even if Blue's explorations of human feelings touch her own, very human, heart.