“Concupiscence in general – and the concupiscence of the body in particular – attacks precisely this ‘sincere gift’: it deprives man, one could say, of the dignity of the gift, which is expressed by his body through femininity and masculinity, and in some sense ‘depersonalizes’ man, making him an object ‘for the other.’”
Pope St. John Paul II, Man and Woman He Created Them, Pauline Books and Media, 2006.