In the popular view, which is sufficient for all practical purposes in ordinary life, sexual is something which combines references to the difference between the sexes, to pleasurable excitement and gratification, to the reproductive function, and to the idea of impropriety and the necessity for concealment. But this is no longer sufficient for science. For painstaking researches (only possible, of course, in a spirit of self-command maintained by self-sacrifice) have revealed that classes of human beings exist whose sexual life deviates from the usual one in the most striking manner. One group among these “perverts” has, as it were, expunged the difference between the sexes from its scheme of life. In these people, only the same sex as their own can rouse sexual desire; the other sex (especially the genital organ of the other sex) has absolutely no sexual attraction for them, can even in extreme cases be an object of abhorrence to them. They have thus of course foregone all participation in the process of reproduction. Such persons are called homosexuals or inverts. Often, though not always, they are men and women who otherwise have reached an irreproachably high standard of mental growth and development, intellectually and ethically, and are only afflicted with this one fateful peculiarity. Through the mouths of their scientific spokesmen they lay claim to be a special variety of the human race, a “third sex,” as they call it, standing with equal rights alongside the other two. We may perhaps have an opportunity of critically examining these claims. They are not, of course, as they would gladly maintain, the “elect” of mankind; they contain in their ranks at least as many inferior and worthless individuals as are to be found amongst those differently constituted sexually.