Nor is this all; if the excitement of a sense, which affects all the other organs, and to which they respond, occurs at a time when their mode of action and of sensation, or their temperament is not formed, this latter varies from what it would be, if developed calmly and uninfluenced by this excited sense. Hence not only the _health_ but the _constitution_ suffers from the too precocious use of the genital organs. He who might have attained the age of manhood, with a robust temperament by which his body resists numerous bad influences by which it is constantly assailed, will after indulging in onanism, be exposed to all these influences. This vice then compromises both the present and future health of the body; the present by the diseases with which it is accompanied, and the future by those for which it prepares. Hence if the young man escapes with life, he is as it were loaded with a tribute of ills which he must pay before long and perhaps always. Thus the indirect influence of onanism in producing human suffering is enormous. I consider it even as greater in proportion than that of the most immediate consequences of this fatal habit. This is confirmed not only by daily observation, but it cannot be otherwise. How much then do those deceive themselves who seek for the diseases of masturbation without believing in their existence, and who continue to indulge because they do not see its abuses. If premature indulgence cause so much injury it should be one of the most interesting duties of humanity to prevent children and young persons from abusing themselves, and although the practice of onanism cannot be controlled by laws, legislators might however fix the age under which marriages could not legally take place. We must however admit that circumstances connected with the social state of different people, with the power of procuring the means of subsistence for a family and the necessity of having vigorous children have contributed not a little to fix this age. Thus the laws frequently present differences which can only be explained by taking into view the necessities under which they were passed. Females however are allowed to marry much younger than males: this depends on two facts, first because puberty takes place earlier in females than in males, and secondly because the latter require their organization to be more advanced to resist the fatigue of generation.