Plain Facts for Old and Young by John Harvey Kellogg

3. _Premature and defective development_ is a symptom closely allied

to the two preceding. When it cannot be traced to such natural causes as overstudy, overwork, lack of exercise, and other influences of a similar nature, it should be charged to self-abuse. The early exercise of the genital organs hastens the attainment of puberty, in many cases, especially when the habit is acquired early, but at the same time saps the vital energies so that the system is unable to manifest that increased energy in growth and development which usually occurs at this period. In consequence, the body remains small, or does not attain that development which it otherwise would. The mind is dwarfed as well as the body. Sometimes the mind suffers more than the body in lack of development, and sometimes the reverse is true. This defective development is shown, in the physical organization of males, in the failure of the voice to increase in volume and depth of tone as it should; in deficient growth of the beard; in failure of the chest to become full and the shoulders broad. The mind and character show the dwarfing influence by failure to develop those qualities which especially distinguish a noble manhood. In the female, defective development is shown by menstrual derangements, by defective growth either in stature, or as shown in unnatural slimness, and in a failure to develop the graces and pleasing character which should distinguish early womanhood. Such signs deserve careful investigation, for they can only result from some powerfully blighting influence.