The power which certain odors have of exciting to desire is by no means doubtful, at least so far as animals are concerned. Most of the mammalia at the period of rutting, exhale certain emanations which serve to inform the male at a distance of the presence of a female and to excite in him the desire of copulation. Even in the insect kingdom some facts exist which cannot be accounted for except on the principle of odorous effluvia. Thus if we shut up in a perfectly close box a female bombyx, we shall soon see males flying around it, who cannot be guided there by the sense of sight. Does any thing similar occur in the human family? Many authors assert the affirmative. “Odors,” says Cabanis, “act powerfully on the nervous system: they incite it to all pleasurable sensations: they communicate to it this slight disturbance which seems to be inseparable from it, and this because they exercise a special influence on the organs which are the seat of the most vivid pleasure granted us by nature. In infancy, the influence of smell is but slight: in old age, it is feeble: it is most active at the period of youth which is that of love.” (_Rapports du phys. an morale de l’homme_, vol. I, p. 222.) Among many nations even in remote antiquity, voluptuous females excited their visitors to desire by the cosmetic use of different perfumes, particularly by musk. This substance has been said to be capable of producing even nocturnal pollutions. (_Luc. Lebrœchus, Hist. Moschi_, ch. 24, p. 153.) On the other hand, we read that Henry IV. thought that the natural odor of the sexual parts was more powerful than any cosmetics. Notwithstanding these testimonials and many others of a similar character, which might be adduced, we believe that in our species, where the sense of smell has so little influence compared to what it has in animals, that odors have but a slight effect in exciting to sexual pleasures. We think it prudent however to forbid the abuse of cosmetics in young people. Irritation of the skin, particularly in the neighborhood of the sexual parts, may act on them as we have seen, and produce venereal desires. Debauched libertines have frequently sought pleasure in this, and have sometimes lashed themselves with thongs, or other instruments of torture. In the time of Nero, the art of invigorating the virile powers with green nettles was known and practised. Many authors have stated details on this topic which may be found in the treatise of Melbourne, (_De flagrorum usu in re venerea_, Lugd. Batav. 1643,[2]) and an article by Virey. (_Dict. des Sc. Med._, art. _Flagellation_.) The pleasures of flagellation, however, also have their limits: it has therefore been prescribed to deaden carnal desires, as well as to excite them. More than one saint has flagellated himself with this hope. In order that it should be efficacious, it should be used with severity.