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 carefulstudy, 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.