Starting from the data that cooperation with religion is the rule in Europe, and that some countries with a Concordat with the Catholic Church, as Italy and Spain tend to extend this model, with some adjustments, to other religious communities, many recent insights suggest the possibility of framing bilaterality as phenomenon that is anything but lying in a shrinking circuit, as much as thriving, in a tendential expansion. This, first of all, because of an observed propensity of bilaterality to reinvent itself in a plastic and changing response to a 'society in need of contact' between civil orbit and Confessions, in the sign of a collaborative dialogue. The survey compares the two models, the Italian and the Spanish - as paradigms -in order to point out some interesting insights of the phenomenon in question.