Although having different conceptual meanings, the sociologist see the contemporary individualism as being a consequence of the crisis of social connections. The level of fusion between the partners decreases and the solidarity also asks for its right to re-conceptualization because the fusion between the partners is more and more influenced by the individual values and advantages, rather than those of the conjugal group. In this context, even the claim of fidelity requires to be re-analysed. The ethics of fidelity seems to (...) be more about the claim of the other’s minimum morality, while the personal escapades appear as simple, inherent experiences. The study aims to analyse the motivations for infidelity, identifying, at the same time, the other’s personal opinions on infidelity. Therefore, we start from the premise that modernity today is more concentrated on the individual, and this orientation creates a model of society based on the triad autonomy – authenticity – individuality. In this regard, the social norm matters only in placing the other within the moral parameters of social ethics, while own morality doesn’t wish to be subject to social control, nor private laws. The study is based on a sociological survey, based on a qualitative research, the research instrument being the semi-structured interview. (shrink)