Any definition of the nature of woman which goes no further than to declare that she has the strong instinct for her own union would be too narrow; any definition that would link her instincts to the child or to the husband, or to both, would be too wide. The most general and comprehensive statement of the nature of woman is that it is completely adapted and disposed for the special mission of aiding and abetting the bodily union of the sexes. All women are match-makers, and this property of the woman to be the advocate of the idea of pairing is the only one which is found in women of all ages, in young girls, in adults, and in the aged. The old woman is no longer interested in her own union, but she devotes herself to the pairing of others. This habit of the old woman is nothing new, it is only the continuance of her enduring instinct surviving the complications that were caused when her personal interests came into conflict with her general desire; it is the now unselfish pursuit of the impersonal idea. It is convenient to recapitulate at this point what my investigation has shown as to the sexuality of women. I have shown that woman is engrossed exclusively by sexuality, not intermittently, but throughout her life; that her whole being, bodily and mental, is nothing but sexuality itself. I added, moreover, that she was so constituted that her whole body and being continually were in sexual relations with her environment, and that just as the sexual organs were the centre of woman physically, so the sexual idea was the centre of her mental nature. The idea of pairing is the only conception which has positive worth for women. The woman is the bearer of the thought of the continuity of the species. The high value which she attaches to the idea of pairing is not selfish and individual, it is super-individual, and, if I may be forgiven the desecration of the phrase, it is the transcendental function of woman. And just as femaleness is no more than the embodiment of the idea of pairing, so is it sexuality in the abstract. Pairing is the supreme good for the woman; she seeks to effect it always and everywhere. Her personal sexuality is only a special case of this universal, generalised, impersonal instinct. The effort of woman to realise this idea of pairing is so fundamentally opposed to that conception of innocence and purity, the higher virginity which man’s erotic nature has demanded from women, that not all his erotic incense would have obscured her real nature but for one factor. I have now to explain this factor which has veiled from man the true nature of woman, and which in itself is one of the deepest problems of woman, I mean her absolute duplicity. Her pairing instinct and her duplicity, the latter so great as to conceal even from woman herself what is the real essence of her nature, must be explained together.