As described in the introduction to this chapter, dyadic partnerships are embedded in a social system that imposes norms upon them and a couple only has limited scope to reject adoption of these norms. But partners, as individuals and as a couple, also develop specific “rules” within the partnership (intrinsic rules) aimed at strengthening the partnership. As well as producing a clear distinction between the couple (us) and society/others (them), these intrinsic ‘rules’ are also used as a “valorisation of uniqueness” of the couple. They are based on individual expectations of a relationship, such as the place of each member, individuation and separation, autonomy and dependency and modalities of distance and closeness.Intimacy is linked with closeness, individuation and separation, autonomy and dependency. It means emotional closeness, requiring empathy for the other. According to Wikipedia, the free internet encyclopaedia, intimacy is “both the ability and the choice to be close, loving and vulnerable.” Intimacy means sharing oneself with one another. The inability to differentiate oneself from the other is a form of symbiosis. Same-sex partnerships and especially lesbian couples seem to be at higher risk of symbiosis than heterosexual couples due to the obvious fact of sharing the same sex. Since ‘gender’ is based on sex, one member of the couple may presume that her partner shares the same socialisation, experiences menses in similar ways and is also exposed to a sexist and hetero-normative society. Further, gender-specific expectations of partners may also play an important role, since women share societal norms of femaleness and consequently expect a certain ‘female’ character and behaviour.