Any attempt at a comparison of absolute sexual power between men and women will be found to be equally futile. The varying manifestations of the sexual faculties, as exhibited in their male and female phases, make the relative measurement of this vital force in men and women quite impossible. Considering, however, the enormous practical edifice of law and custom which has been built up on the very sandy foundation of the supposed stronger character of male sexual passion, it is necessary to examine closely the facts of human nature, and challenge many erroneous conclusions. Any theory which proposes two methods of judgment or two measures of law, in consequence of a supposed difference of vital power, is emphatically uncertain, and lays itself open to just suspicion of dangerous error. The equal numbers of men and women, their equal longevity, and consequently equal power of enduring the wear and tear of life, prove the equal general vital power of the sexes. In considering further the special sexual manifestations of the two sexes, we observe that the power of reproduction commences at an earlier age in women than in men. The physical life of the sexual faculties at the same early age is more vigorous in the female than in the male, and all those social interests which centre round sex in the human race are in the young woman stronger; whilst at the same age the experience and intellectual development which should give dignity and profundity to the noble object of sex--parentage--are not yet attained. The ‘eagerness for a romance’ and the unconscious impulse towards parentage are developed earlier, and absorb a larger proportion of vital force in the girl than in the boy. At a later age, when physical sex is fully developed in the young adult, we are still struck by the greater proportion of vital force demanded from or given by women to all that is involved in sexual life. The physical functions of sex weigh more imperiously upon the woman than the man, compel more thought and care, and necessitate more enlightened intelligence in the general arrangements of life. Physical sex is a larger factor in the life of the woman, unmarried or married, than in the life of the man, and this is the case at every period of the full vigour of life. In order to secure the perfect health and independent freedom which is the birthright of every rational human being, larger wisdom is required for the maintenance of perfect physical health in the woman than in the man, this function being a more important element in the one than in the other.