As we have moved down the ages, now and then, from the religious teacher, thestatesman, the inventor, the social worker, or from the doctor, surgeon, orsexologist, there has been a \'vox clamantis in deserto.\' Usually these voiceshave fallen on unheeding ears; but again and again some delver in books, somestudent of men, some inspired, self-effacing, or altruistic one has taken up thecry; and at last unthinking, unheeding, superficial, self-satisfied humanity hasturned to listen.Aristotle by the sure inductive method learned and taught much, concerning thesex relations of men and women, that it would profit us today to heed. Balzac,Luther, Michelet, Spencer, and later, at our very doors, Krafft-Ebbing, Forel,Bloch, Ellis, Freud, Hall, and scores of others have added their voices. All thesehave seen whither we were drifting, and have made vigorous protests accordingto their lights. Many of these protests should have been heard, but were not, andonly now are just beginning to be heeded. Such pioneers in the field of proper,healthful, ethical, religious, sane daily sex living, have been Sturgis andMalchow, who talked earnestly to an unheeding profession of these things, andnow, I have the honor to write an introductory word to a book in this field, that issane, wise, practical, entirely truthful, and unspeakably necessary.I can endorse the teachings in Dr. Long's book more fully because I have, fornearly a quarter of a century, been holding similar views, and dispensing similar,though perhaps less explicit, information. I know from long observation that theteaching is wholesome and necessary, and that the results are universallyuplifting. Such teachings improve health, prolong life, and promote virtue,adding to the happiness and lessening the burdens of men, on the one hand; onthe other, reducing their crimes and vices. A book like this would have provedinvaluable to me on my entrance to the married state; but had I had it, I mightnot have been forced to acquire the knowledge which enables me now to statewith all solemnity, that I personally know hundreds of couples whose lives werewrecked for lack of such knowledge, and that I more intimately know hundredsof others to whom verbal teaching along the lines he has laid down, has broughthappiness, health and goodness