Should we welcome social robots into interpersonal relationships? In this paper I show that an adequate answer to this question must take three factors into consideration: (1) the psychological vulnerability that characterizes ordinary interpersonal relationships, (2) the normative significance that humans attach to other people’s attitudes in such relationships, and (3) the tendency of humans to anthropomorphize and “mentalize” artificial agents, often beyond their actual capacities. I argue that we should welcome social robots into interpersonal relationships only if they are (...) endowed with a social capacity that is functionally similar to our own capacity for social norms. Drawing on an interdisciplinary body of research on norm psychology, I explain why this capacity is importantly different from pre-programmed, top-down conformity to rules, in that it involves an open-ended responsiveness to social corrective feedback, such as that which humans provide to each other in expressions of praise and blame. (shrink)