And by the way: Christ said, “Every one who looks at a woman lustfully has already committed adultery with her in his heart” (Mt 5:28). This is a violation of the ninth Commandment and a grave sin. “Since they express man's fundamental duties towards God and towards his neighbor, the Ten Commandments reveal, in their primordial content, grave obligations. They are fundamentally immutable, and they oblige always and everywhere. No one can dispense from them. The Ten Commandments are engraved by God in the human heart” (Catechism of the Catholic Church, no 2072).