One knows that a cat's tongue is rough: so is the tongue and all the mucous surfaces of negroes. This roughness of surface notably augments the genital pleasure, as men who have known negresses testify. It has been perfected. The Dyaks of Borneo pierce the extremity of the penis, through the navicular channel and fit into it a pin to both ends of which are attached tufts of stiff hair in the form of a brush. Before surrender the women by certain tricks and certain traditional gestures indicate the length of the brush desired. In Java one replaces this apparatus known as the ampallang, by a sheath of goat skin, more or less thick. In other countries there are incrustations of little pebbles, which give the gland the shape of an embossed mace; and these pebbles are sometimes replaced by tiny bells, so that the men make in running a sound like mules, and attentive women can judge their value according to the intensity of their sexual music. These customs, noted by de Paw among certain aborigines of America, have not been recently observed, doubtless because the Christian modesty of modern travellers has obliterated their eyes and ears at convenient moments. No custom is abolished save in the face of some other custom more useful to sensuality, and the imagination seems rather to advance than to recede in these matters. It is true that the inventors hide themselves, even in savage countries, sexual morality tending toward uniformity. These artifices, which appear curious to us, have certainly been created at the instigation of women, since theirs is the profit of them. Males have submitted to them, happy no doubt to be delivered at the price of passing pain from the terrible lasciviousness of their females. Racked and flayed by such instruments the women ought, at least for a few days, to flee the male and brood in silence upon their luxurious memories. Chinese and Japs, whose women are likewise lascivious, are familiar with analogous means; to dominate their companions they have also invented ingenious onanist methods which give them time to attend to their own affairs, while peace reigns over their hearthstones. In the strange dissemblance between human races the Aryans have, for the same purpose, made use of the religious check-rein, of prayer, of the idea of sin, and finally of liberty, that is to say of the pleasure of vanity which bewilders the woman, and invites her to please someone else before satisfying herself.