It is, I think, very necessary to distinguish between sex-passion and the desire for a child; they are not the same, though, of course, the one impulse may be, and is as a rule, involved in the other. We need more clear thinking and frank speaking on the two elements in the reproductive act. This is a human problem, one that belongs to mankind alone; moreover, it has greatly increased among civilised races, and is likely to become more, and not less, difficult with the advance of time. Animals have sex-passion, which is neither love as we feel it nor lust; with them, as also in some degree with most primitive peoples, this passion is seasonal, not always active, and is more or less closely connected with the obtaining of offspring. Far different and much more complicated are the conditions of love among us to-day. Men and women have a continuous desire for love, with sex-passion as its outward expression and children for its efflorescence. They also have lust, which is a comparatively new expression,[81] at least, that is my opinion as to what is true of the majority among us. I do not use the word “lust” here in any sense of contempt, but to express strong and conscious sex-passion, seeking its own satisfaction without connection with any possible result in a child. Then at a much lower level there is lust-desire without love, or clothed merely in a rootless ephemeral mimicry of passion—a libertinage having no law but curiosity in self-indulgence. And all passion is a very different thing from the serene considerations which, according to the Prayer Book, cause men and women to marry. Now, it is because of what sex-passion has come to be among us—its variety in desire and in result—that we are far more remote than pre-human and primitive parents from having marriage and parenthood settled so as to meet the desires and sex-needs of every one, as would be easily possible if the reproductive act could be regarded as being solely, or even chiefly, connected with the birth of children. I do not know if I have made my meaning perfectly clear, but what I wish to insist upon is this: It is necessary in all questions and judgments connected with marriage to consider the presence or absence in the partners of the wish to produce and possess a child. I propose to deal briefly with this question in relation to the character of women.