Now this differentiation according to locality is conditioned above all else by climate; hence the question we have now first of all to answer is this: _what influence did climate manifest in Ancient times on the activity of the genital organs in general and in particular?_ and, _to what extent may a factor favourable to the rise of affections of the genitals be deduced from it?_ True, direct information on the point has so far reached us only sparingly, still such as we have is enough to justify a general view on the whole question, especially if we reinforce it with the results of more recent observation,—always provided this be done with proper precaution, for we sometimes find the Ancients commending the climate of a particular country as being exceedingly healthy, whereas in more modern times exactly the opposite is noted. As the evidence extant and available extends only to Asia, and in particular Syria, Palestine and Asia Minor, to Egypt, Greece and Italy, there can for the present be no question except as to the climate of these countries. Next as to _the influence of sexual activity in general_, _Hippocrates_[145] himself tells us, after discussing the climate of Asia: “But ἡδονή (pleasure) must necessarily predominate (among them), and this is why among animals so many varieties are found; and I suppose this to be equally true in the case of the Egyptians and Lydians also.” Of course ἡδονή in this passage signifies concupiscence in particular;—no special proof is needed of this. As a matter of fact we observe at the present day how in hot climates, where the whole vegetative life presents a luxuriant character, and all Nature appears to feel the procreative impulse unceasingly, man too falls in with the universal stress and strain of each species to maintain its foothold. Yet as this must inevitably be done at the expense of the individual life, we see the effort very frequently resulting in the production of barren or sexless blossoms, and not fruit at all. The son of the South is like a tree growing in rich, rank soil; he ripens betimes to the sexual life, but equally early is constrained to abandon it again. The youthful imagination springs up in its fresh quick activity, while the body withers concurrently, and stung by lust,—lust that is yet further exaggerated by the misuse of _aphrodisiacs_, at last has nothing left but to drag out an invalid existence, finding a morbid gratification in the artificial ways and means whereby imagination, sickened and debauched by its own extravagances, seeks to supply from extraneous sources the failing titillation of desire the organ craves. No better confirmation of all this can be found than what is supplied already in our investigations as so far conducted.