Engineering develops technologies that shape the way of relating to ourselves and others, and the last developments in robotics force us to focus on the effects of their introduction. New robots have been designed to be intimate and even potential sexual partners. Many studies work on the ethical implications of sex robots by providing a normative approach to ethically assess their introduction in the society. However, few works focus on the effects they have on the relations binding people in general, and even fewer works focus on these effects from a phenomenological perspective. This paper aims at analyzing how technologies shape the relationships from a phenomenological perspective by highlighting the process of the constitution of subjects in a love relationship. More specifically, this work shows what happens when a human being is in a love relationship while the partner uses sex robots through the analysis of texts by Husserl and Merleau-Ponty. In conclusion, this paper wants to provide a novel application of phenomenological concepts to intimate relationships with robots.