In other words it is a case of cause and effect. That the joy of motherhood is greater than any other joy in a woman’s life has absolutely nothing to do with the question as to whether or not the hope of that joy was the reason for the selection of a mate. The question is not one of superiority but priority; not which is the greater, but which came first; which is the cause and which the effect. If the desire for children is the cause of what we call love, the only logical outcome is that in selection any woman could not refuse any man fit to be the father of her children on the ground that he did not appeal to her personally. Life does not support such a conclusion. Why woman’s choice is not impersonal is only one of the many things that cannot be explained by the theory that makes her desire for children the sole cause of attraction. It does not explain too many things: faithless wives, some childless marriages, children found on door-steps, abortions, some prostitution, why some women never marry for fear of children, or why man is not the coy, reluctant, elusive creature defined, though not pictured, by Dawson and Shaw. No wonder it fails to explain; for children, instead of being the whole cause are the result of only a part of the cause, mate hunger—a hunger of body, mind, and spirit. Love is the feeling for the one that seems to supply those needs, the impulse toward that one. The sooner we realize that the attraction between men and women is not all physical any more than it is all mental and spiritual, and that sex is in all three phases, the sooner shall we reach the truth; the sooner shall we hear the last of one type that prudishly denies physical attraction or else tries to “purify” it by making it a means to an end, and of the other type that sees in marriage only physical union. The theory will not stand either a logical or an emotional test. Not only can it not explain this confusion of cause and effect, this mistaking the part of love for its whole; but it also cannot answer why it should look to the future for a cause when love is so vitally a thing of the present; nor why it was ever thought necessary to find any explanation outside of itself for the attraction between men and women. If there is any passion in the world that does not need a justification other than its mere existence, it is love. For though realizing the exaltation of moral passion, the exhilaration of mental passion, no one can deny that it is through love we know intense, vivid personal happiness—happiness that is vibrant, full of color, rapturous.