The authors make an interdisciplinary approach to prostitution, with emphasis on women. From the psychological point of view, they adopt a systemic approach, and validate the expression "persons in prostitution situation"; they review the state of the art in legal matters and public policies, making a critical analysis based on the tradition of realistic thinking. They argue that one of the fundamental issues involved is the unity of the human person and the role that intimacy plays in it, polemicizing against usual objections. Finally, they state their conclusions, which implies affirming that prostitution considers human person as object, and therefore it is contrary to her or his dignity.