when it has a voluptuous tinge.[18] Passing to the consideration of the =posture= adopted during intercourse, we find in civilized man, who in this respect is far removed from animals, the normal position during coitus is front to front, the woman lying on her back with her lower extremities widely separated, and the knee and hip joints semiflexed; the man lies on her, with his thighs between hers, supporting himself on hands or elbows--or often the two unite their lips in a kiss. Of all other numerous positions during coitus, or _figuræ Veneris_, some of which, according to Sheikh Nefzawi, are possible only “in words and thoughts,” the postures that demand consideration on hygienic grounds are, lateral decubitus of the woman, dorsal decubitus of the man, and coitus _a posteriori_ (for example, when man and woman are extremely obese); but this subject belongs rather to the chapter on sexual hygiene. Ploss-Bartels has proved that the position described above as normal was usual already in ancient times and amongst the most diverse peoples. The adoption of this position in coitus undoubtedly ensued in the human race upon the evolution of the upright posture. It is the natural, instinctive position of civilized man, who in this respect also manifests an advance on the lower animals. [13] Apart from Strindberg and Weininger, who advocate, for the salvation of the future and as ideals of development, the most pronounced and one-sided development of the masculine type, I need refer only to “The Physiological Weakmindedness of Woman” by Möbius, and to such writings as B. Friedländer’s “Renaissance des Eros Uranios” (Berlin, 1904), and to Eduard von Mayer’s “The Vital Laws of Civilization” (Halle, 1904), as characteristic symptoms of such a reaction.