According to contemporary scientific research, the human person is so profoundly affected by sexuality that it must be considered as one of the factors which give to each individual's life the principal traits that distinguish it. In fact it is from sex that the human person receives the characteristics which, on the biological, psychological and spiritual levels, make that person a man or a woman, and thereby largely condition his or her progress towards maturity and insertion into society. Hence sexual matters, as is obvious to everyone, today constitute a theme frequently and openly dealt with in books, reviews, magazines and other means of social communication.