As scientists hold the world's first conference on sex robots, one expert warns that making love to machines could become addictive. Robot experts from around the world will converge on Manchester in northern England this week for the Human Choice and Computers Conference, where they will explore the latest research and theories about how humans will engage with robots. Academics will also touch on moral issues, such as whether sex robots are potentially harmful and should be banned. The conference will feature a keynote speech from Professor Charles Ess from the University of Oslo, titled: 'What's love got to do with it? Robots, sexuality, and the art of being human.' Opinion appears to be divided over whether sex robots might be a positive influence by helping humans to explore their sexuality, or whether their constant willingness to have sex will be destructively addictive. Robots expert Joel Snell, of