The reports of medical men regarding the damage done by the social diseases are inaccurate chiefly when they attempt to state percentages of the whole population. They are reliable when they state observed facts, such as the following: It is now established in medical science that (1) gonorrheal infection results in tens of thousands of cases in complications, such as heart disease, gonorrheal rheumatism, sterility of both men and women, blindness of infants, inflammatory diseases of female reproductive organs, and other well-marked sequelae of the disease; and (2) that syphilis is responsible for a large majority of cases of locomotor ataxia, paresis and certain types of insanity, and also for numerous aneurisms of arteries, many apoplexies, and much disease of liver, kidneys, and other organs. Moreover, syphilis is charged with being the greatest race destroyer. Fournier, the great French specialist, noted that only two children survived from a series of ninety pregnancies of syphilitic women of the well-to-do class. It is probably true that much less than ten per cent of syphilitized embryos ever grow into mature men and women, and even these few survivors are likely to carry in their bodies the germs or the "virus" of syphilis which may affect the next generation. [Sidenote: Social diseases admittedly dangerous.] Such direct statements as the above may be accepted as not exaggerated. However, it little matters in sex-education, except for the purposes of sensational writers, whether statistics regarding the damage done by venereal diseases are more than estimates; for it is sufficient to remember that every physician of large experience agrees that syphilis and gonorrhea are so common and so destructive of health and life that they must be classed among the most dangerous diseases that now threaten the human race. This ought to be sufficient to attract the serious attention of every thinking man and woman. [Sidenote: Double standard of morality.] Thus, in general survey, we see the great problems of social-sexual hygiene caused by diseases that are widely distributed because sexual instincts are uncontrolled. In short, the alarming problem of the social diseases results from masculine promiscuity or the failure of men to adhere to the monogamic standards of morality. In other and familiar phrasing, there is widespread acceptance and practice of the so-called "double standard of sexual morality," a monogamic one for respectable women and promiscuity for many of their male relatives and friends. (See writings of Morrow, especially "The Sex Problem"; also Creighton's "The Social Disease.") [Sidenote: One problem for sex-education.]