Master the Art of Love which is the divinest art in all the world; then study and do your best to master the Science of Procreation. It is these two the Art of Love and the Science of Procreation that
together make married life a success. Without these or surely without the first there can be no such thing as true marriage. Hence this is the first to learn to master. It is worthy of the most careful
study the most faithful experiment. It is right for people who never can have children to marry and to share with each other mutual sex delights. It is far better for a husband and wife having learned the Art of Love to have children and a home.