Those who seek to eliminate the erotic factor from marriage as unessential, or at all events as only permissible when strictly subordinated to the end of procreation, have made themselves heard from time to time at various periods. Even the ancients, Greeks and Romans alike, in their more severe moments advocated the elimination of the erotic element from marriage, and its confinement to extra-marital relationships, that is so far as men were concerned; for the erotic needs of married women they had no provision to make. Montaigne, soaked in classic traditions, has admirably set forth the reasons for eliminating the erotic interest from marriage: "One does not marry for oneself, whatever may be said; a man marries as much, or more, for his posterity, for his family; the usage and interest of marriage touch our race beyond ourselves.... Thus it is a kind of incest to employ, in this venerable and sacred parentage, the efforts and the extravagances of amorous license" (Essais, Bk. i, Ch. XXIX; Bk. iii, Ch. V). This point of view easily commended itself to the early Christians, who, however, deliberately overlooked its reverse side, the establishment of erotic interests outside marriage. "To have intercourse except for procreation," said Clement of Alexandria (Pædagogus, Bk. ii, Ch. X), "is to do injury to Nature." While, however, that statement is quite true of the lower animals, it is not true of man, and especially not true of civilized man, whose erotic needs are far more developed, and far more intimately associated with the finest and highest part of the organism, than is the case among animals generally. For the animal, sexual desire, except when called forth by the conditions involved by procreative necessities, has no existence. It is far otherwise in man, for whom, even when the question of procreation is altogether excluded, sexual love is still an insistent need, and even a condition of the finest spiritual development. The Catholic Church, therefore, while regarding with admiration a continence in marriage which excluded sexual relations except for the end of procreation, has followed St. Augustine in treating intercourse apart from procreation with considerable indulgence, as only a venial sin. Here, however, the Church was inclined to draw the line, and it appears that in 1679 Innocent XI condemned the proposition that "the conjugal act, practiced for pleasure alone, is exempt even from venial sin."

Protestant theologians have been inclined to go further, and therein they found some authority even in Catholic writers. John à Lasco, the Catholic Bishop who became a Protestant and settled in England during Edward VI's reign, was following many mediæval theologians when he recognized the sacramentum solationis, in addition to proles, as an element of marriage. Cranmer, in his marriage service of 1549, stated that "mutual help and comfort," as well as procreation, enter into the object of marriage (Wickham Legg, Ecclesiological Essays, p. 204; Howard, Matrimonial Institutions, vol. i, p. 398). Modern theologians speak still more distinctly. "The sexual act," says Northcote (Christianity and Sex Problems, p. 55), "is a love act. Duly regulated, it conduces to the ethical welfare of the individual and promotes his efficiency as a social unit. The act itself and its surrounding emotions stimulate within the organism the powerful movements of a vast psychic life." At an earlier period also, Schleiermacher, in his Letters on Lucinde, had pointed out the great significance of love for the spiritual development of the individual.

Edward Carpenter truly remarks, in Love's Coming of Age, that sexual love is not only needed for physical creation, but also for spiritual creation. Bloch, again, in discussing this question (The Sexual Life of Our Time, Ch. VI) concludes that "love and the sexual embrace have not only an end in procreation, they constitute an end in themselves, and are necessary for the life, development, and inner growth of the individual himself."

It is argued by some, who admit mutual love as a constituent part of marriage, that such love, once recognized at the outset, may be taken for granted, and requires no further discussion; there is, they believe, no art of love to be either learnt or taught; it comes by nature. Nothing could be further from the truth, most of all as regards civilized man. Even the elementary fact of coitus needs to be taught. No one could take a more austerely Puritanic view of sexual affairs than Sir James Paget, and yet Paget (in his lecture on "Sexual Hypochondriasis") declared that "Ignorance about sexual affairs seems to be a notable characteristic of the more civilized part of the human race. Among ourselves it is certain that the method of copulating needs to be taught, and that they to whom it is not taught remain quite ignorant about it." Gallard, again, remarks similarly (in his Clinique des Maladies des Femmes) that young people, like Daphnis in Longus's pastoral, need a beautiful Lycenion to give them a solid education, practical as well as theoretical, in these matters, and he considers that mothers should instruct their daughters at marriage, and fathers their sons. Philosophers have from time to time recognized the gravity of these questions and have discoursed concerning them; thus Epicurus, as Plutarch tells us,[[375]] would discuss with his disciples various sexual matters, such as the proper time for coitus; but then, as now, there were obscurantists who would leave even the central facts of life to the hazards of chance or ignorance, and these presumed to blame the philosopher.

There is, however, much more to be learnt in these matters than the mere elementary facts of sexual intercourse. The art of love certainly includes such primary facts of sexual hygiene, but it involves also the whole erotic discipline of marriage, and that is why its significance is so great, for the welfare and happiness of the individual, for the stability of sexual unions, and indirectly for the race, since the art of love is ultimately the art of attaining the right conditions for procreation.

"It seems extremely probable," wrote Professor E. D. Cope,[[376]] "that if this subject could be properly understood, and become, in the details of its practical conduct, a part of a written social science, the monogamic marriage might attain a far more general success than is often found in actual life." There can be no doubt whatever that this is the case. In the great majority of marriages success depends exclusively upon the knowledge of the art of love possessed by the two persons who enter into it. A life-long monogamic union may, indeed, persist in the absence of the slightest inborn or acquired art of love, out of religious resignation or sheer stupidity. But that attitude is now becoming less common. As we have seen in the previous chapter, divorces are becoming more frequent and more easily obtainable in every civilized country. This is a tendency of civilization; it is the result of a demand that marriage should be a real relationship, and that when it ceases to be real as a relationship it should also cease as a form. That is an inevitable tendency, involved in our growing democratization, for the democracy seems to care more for realities than for forms, however venerable. We cannot fight against it; and we should be wrong to fight against it even if we could.

Yet while we are bound to aid the tendency to divorce, and to insist that a valid marriage needs the wills of two persons to maintain it, it is difficult for anyone to argue that divorce is in itself desirable. It is always a confession of failure. Two persons, who, if they have been moved in the slightest degree by the normal and regular impulse of sexual selection, at the outset regarded each other as lovable, have, on one side or the other or on both, proved not lovable. There has been a failure in the fundamental art of love. If we are to counterbalance facility of divorce our only sound course is to increase the stability of marriage, and that is only possible by cultivating the art of love, the primal foundation of marriage.

It is by no means unnecessary to emphasize this point. There are still many persons who have failed to realize it. There are even people who seem to imagine that it is unimportant whether or not pleasure is present in the sexual act. "I do not believe mutual pleasure in the sexual act has any particular bearing on the happiness of life," once remarked Dr. Howard A. Kelly.[[377]] Such a statement means—if indeed it means anything—that the marriage tie has no "particular bearing" on human happiness; it means that the way must be freely opened to adultery and divorce. Even the most perverse ascetic of the Middle Ages scarcely ventured to make a statement so flagrantly opposed to the experiences of humanity, and the fact that a distinguished gynecologist of the twentieth century can make it, with almost the air of stating a truism, is ample justification for the emphasis which it has nowadays become necessary to place on the art of love. "Uxor enim dignitatis nomen est, non voluptatis," was indeed an ancient Pagan dictum. But it is not in harmony with modern ideas. It was not even altogether in harmony with Christianity. For our modern morality, as Ellen Key well says, the unity of love and marriage is a fundamental principle.[[378]]

The neglect of the art of love has not been a universal phenomenon; it is more especially characteristic of Christendom. The spirit of ancient Rome undoubtedly predisposed Europe to such a neglect, for with their rough cultivation of the military virtues and their inaptitude for the finer aspects of civilization the Romans were willing to regard love as a permissible indulgence, but they were not, as a people, prepared to cultivate it as an art. Their poets do not, in this matter, represent the moral feeling of their best people. It is indeed a highly significant fact that Ovid, the most distinguished Latin poet who concerned himself much with the art of love, associated that art not so much with morality as with immorality. As he viewed it, the art of love was less the art of retaining a woman in her home than the art of winning her away from it; it was the adulterer's art rather than the husband's art. Such a conception would be impossible out of Europe, but it proved very favorable to the growth of the Christian attitude towards the art of love.