There is no doubt that an emission of semen following sexual excitement is a draught upon the virile powers of the male animal. If this sexual excitement is the artificial one cultivated by the masturbator, the depletion seems to be more marked than is the case with the normal, natural stimulation incident to sexual intercourse. Some have suggested that the reciprocal influence of the woman can in some way compensate for the vital fluid contributed by the male. It is hardly likely that such a reciprocal influence is other than psychical, but that is certainly sufficient to account for any difference in these two forms of sexual gratification. Nature calls upon the male animal to make a contribution for procreation, which contribution is, always has been, and, in the very nature of the case, always must be a certain tax upon the powers of the male animal. When the intercourse is indulged for procreation only, the male animal can well afford to make the contribution. Even with that, the contribution which the male makes to procreation is incomparably less depleting for him than are the contributions which the female makes for her. 11. _Will vital fluid flow with every sexual intercourse?_ If vital fluid is present, and if the sexual intercourse is carried to the point of causing an orgasm, there would, in all normal conditions, be an emission of semen or "vital fluid." 12. _Is there any way to regulate intercourse so as to control the sex of the offspring?_ While there are many theories upon this subject no one of them is generally accepted by medical men. 13. _Will an intense and continuous desire on the part of a young man for sexual intercourse cause a loss of seminal fluid?_