If this ideal had been reached, the instinct, like all those perfectly adjusted, would tend to become unconscious; and we should miss those secondary effects with which we are exclusively concerned in aesthetics. For it is precisely from the waste, from the radiation of the sexual passion, that I beauty borrows warmth. As a harp, made to vibrate to the fingers, gives some music to every wind, so the nature of man, necessarily susceptible to woman, becomes simultaneously sensitive to other influences, and capable of tenderness toward every object. The capacity to love gives our contemplation that glow without which it might often fail to manifest beauty; and the whole sentimental side of our aesthetic sensibility -- without which it would be perceptive and mathematical rather than aesthetic -- is due to our sexual organization remotely stirred. The attraction of sex could not become efficient unless the senses were first attracted. The eye must be fascinated and the ear charmed by the object which nature intends should be pursued. Both sexes for this reason develope secondary sexual characteristics; and the sexual emotions are simultaneously extended to various secondary objects. The colour, the grace, the form, which become the stimuli of sexual passion, and the guides of sexual selection, acquire, before they can fulfil that office, a certain intrinsic charm. This charm is not only present for reasons which, in an admissible sense, we may call teleological, on account, that is, of its past utility in reproduction, but its intensity and power are due to the simultaneous stirring of profound sexual impulses. Not, of course, that any specifically sexual ideas are connected with these feelings: such ideas are absent in a modest and inexperienced mind even in the obviously sexual passions of love and jealousy. These secondary objects of interest, which are some of the most conspicuous elements of beauty, are to be called sexual for these two reasons: because the contingencies of the sexual function hare helped to establish them in our race, and because they owe their fascination in a great measure to the participation of our sexual life in the reaction which they cause. If any one were desirous to produce a being with a great susceptibility to beauty, he could not invent an instrument better designed for that object than sex. Individuals that need not unite for the birth and rearing of each generation, might retain a savage independence. For them it would not be necessary that any vision should fascinate, or that any languor should soften, the prying cruelty of the eye. But sex endows the individual with a dumb and powerful instinct, which carries his body and soul continually towards another; makes it one of the dearest employments of his life to select and pursue a companion, and joins to possession the keenest pleasure, to rivalry the fiercest rage, and to solitude an eternal melancholy.