The progressive disintegration in our modern societies of family systems and of the prohibition of incest allows us a theoretical step. If, outside of any family relationship, this double erasure has brought out the sexual crime as such - that is, the sexual abuse “ between the adults and the child ” (Ferenczi), this could be the sign the interdict did at all times try to contain – without being completely able to do so – the polymorphous and unbound sexuality present not only in the infant but in the infantile unconscious of the adult.