The Gregorian reformation performed a large disciplinary reorganization of the christianity from the XIth to the XIIIth century. One of its most important consequences happened at the sacramental field. The introduction of the matrimony in the sacramental field played a role whose importance is not yet revealed by the studies on the Gregorian Era. This sacramentalization made more pressing the necessity of considering the problem of sexual sin, especially, the problem of adultery.