This book provides cross-cultural ethical exploration of sex robots and their social impact. What are the implications of sex robots and related technological innovations for society and culture? How should we evaluate the significance of sexual relations with robots that look like women, men or children? Critics argue that sex robots present a clear risk to real persons and a social degradation that will increase sexual violence, objectify women, encourage pedophilia, reinforce negative body images, increase forms of sexual dysfunction, and pass on sexually transmitted disease. Proponents judge robotic sexual companionship as just another step in the exploration of human desire. They see sex robots, and similar technology, such as virtual reality pornography, as providing autonomy affirming companionship for the lonely and a relatively harmless outlet for sexual fantasies that avoids the use of human prostitutes and thus reduces sexual victimization. Some appreciate sex robots as a social evil, others as a positive good, and still others as a harmless pastime. How we come to terms with such conceptual and moral concerns will have significant implications for society and the future of human relations. This book is of great interest to researchers in bioethics, human sexual behavior, AI ethics, and philosophy of sex.