Its purpose is not to make us nervous, to quench love with cautiousness or stifle spontaneity, but to help us to be open and free. He teaches us to channel the powerful drives of sexuality into authentic and honest love. When a man and a woman come to love each other enough to leave father, mother and all familiar things, coming together is not to be for a passing moment. This kind of love is meant to endure a lifetime. Personal love, touched with the energy of sexuality, speaks by God's design of faithful and lasting commitment, of promises that must be kept.
Genesis also underlines the creative aspect of sexuality.
Sexual activity not only serves enduring love, but through such love also calls new persons into being. New life is born out of acts of human love, to become the joy of parents and the focus of their lives. All sexual activity should be an expression of faithful love and should be open to new life. Life must be formed, nurtured, and educated, and that takes place within the family where the husband and wife work together. This vision of family and children demands a lifelong commitment of love to each other.