Morning drop, 202 Morris, 244 Mortimer, 7 Morula, 17 Mucus—smell of vaginal, 98; menstruation of, 87 Müllerian ducts, 20 Mundé, 88 Murders, erotic, 148 Music and sex, 129 Mutations, 16 Mystery—of creation, 3; of sex-attraction, 275; of woman’s psyche, 306 Mysticism, erotic, 247 Näcke, 402 Nahum, 371 Narcissus complex in women, 307 Narcotic of business, 153 Nasher, 331 Natural—selection, 14, 339; laws, 8 Nature—of divinity, 275; disregard of the individual by, 382; female principle in, 3; of life, 384; rationality in, 382; standard of morality in, 379 Necessity, homosexuality out of, 281 Neisser, 343, 393, 395 Neo-Darwinians and Lamarckians, 13 Neurasthenics, 80; and abstinence, 17; and intercourse, 356 New ethics, 16 Newly-wed, leucorrhoea in, 394 Nietzsche, 140, 341, 346, 371, 372 Nipple in sex, 129 Nocturnal—emissions, 110, 203, 401; erections, 174, 177, 193, 194, 196 Noirot, 359 Nordau, 141, 150 Nubility, 402 Nudity—female, 307; in homosexuality, 287; obscenity of, 365; sight of, 318; source of libido, 97 Number—of children in a family, 358; of spermatozoa, 382 Nursery, rules of, 317 Nursing—of the young, 129; mechanism of, 102 Nurture, 338; change of organism by, 15 Nymphomania, 174, 220, 229, 231, 313 Obedience, bride’s promise of, 151 Obesitas, impotence in, 193 Obscene, 318; effect of, 366; sentiments, 9 Obscenity in mixoscopy, 226 Obstacles—law of, 390; to continence, 404 Obstruction in development of love, 146 Odor feminae, 98 Odors—erotic, 98; of flowers, 120; love of, 127 Oettinger, 359 Offspring—dispareunia and, 359; limitation of, 340; vita sexualis and, 358 Old Testament—phallicism in, 2; courtesan in, 4 Onanism—in men, 174, 202; in women, 184 Oophorines, 85 Ophir, gold of, 373 Organic impotence, 192 Orgasmus, 81, 93; female, 91, 94, 95; female convulsion at, 92; observed, 88; position during, 350; praecox, 221; retardatus, 221, 216, 351; taste of, 111 Origin—of kissing, 96; of sex-attraction, 124; of man, 318 Origines, 6 Osiris, 3 Ova, number of, 382 Ovarian, internal secretion, 84 Ovaries, 115; loss of, 154 Ovarines, 155 Ovary, 24, 52, 83; of plant, 119 Ovid, 183, 215, 357 Ovulation, 83 Ovum—anatomy, 54; maturition of, 63, 83; wandering of, 83 Oxaluria, 205 Paget, 237, 246 Pain—in libido, 98, 184; in lower abdomen, 394; in masochism, 253 Pairing, family, 127, 386 Palpitation—heart, in libido, 92, 199, 361; in masochism, 241 Panderism, 224, 226 Panmixia, 346 Paradoxia, 161, 163 Paraesthesia, 253 Parallelism in Judeo-Christian creed, 370; in Pentateuch and Hammurabi codex, 371 Paralytic impotence, 193 Parental love, 136, 139