Kathleen Richardson of the wrote a position paper arguing "that Levy’s proposal shows a number of problems, firstly his understanding of what prostitution is and secondly, by drawing on prostitution as the model for human-robot sexual relations, Levy shows that the sellers of sex are seen by the buyers of sex as things and not recognised as human subjects." She goes on to argue that "this legitimates a dangerousmode of existence where humans can move about in relations with other humans but not recognise them as human subjects in their own right."