64 The eminent way to protect and nourish an unsullied and perfect chastity, as proven by experience time and again throughout the course of centuries, is solid and fervent devotion to the Virgin Mother of God. In a certain way all other helps are contained in this devotion; there is no doubt that whoever is sincerely and earnestly animated by this devotion is salutarily inspired to constant vigilance, to continual prayer, to receive the Sacraments of Penance and the Holy Eucharist. Therefore in a paternal way We exhort all priests, religious men and women, to entrust themselves to the special protection of the holy Mother of God who is the Virgin of virgins and the "teacher of virginity," as Ambrose says, and the most powerful Mother of those in particular who have vowed and consecrated themselves to the service of God.
Source: Sacra Virginitas (Vatican.va)