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GENERAL PREFACE
THE EVOLUTION OF MODESTY-1.1
THE EVOLUTION OF MODESTY-1.2
THE EVOLUTION OF MODESTY-1.3
THE EVOLUTION OF MODESTY-1.4
THE EVOLUTION OF MODESTY-1.5
THE EVOLUTION OF MODESTY-1.6
THE EVOLUTION OF MODESTY-2.1
THE EVOLUTION OF MODESTY-2.2
THE EVOLUTION OF MODESTY-2.3
THE EVOLUTION OF MODESTY-2.4
THE EVOLUTION OF MODESTY-2.5
THE EVOLUTION OF MODESTY-3
THE EVOLUTION OF MODESTY-4
THE PHENOMENA OF SEXUAL PERIODICITY-1.1
THE PHENOMENA OF SEXUAL PERIODICITY-1.2
FOOTNOTES
THE PHENOMENA OF SEXUAL PERIODICITY-2.1
THE PHENOMENA OF SEXUAL PERIODICITY-2.2
THE PHENOMENA OF SEXUAL PERIODICITY-2.3
THE PHENOMENA OF SEXUAL PERIODICITY-3.1
THE PHENOMENA OF SEXUAL PERIODICITY-3.2
THE PHENOMENA OF SEXUAL PERIODICITY-3.3
THE PHENOMENA OF SEXUAL PERIODICITY-3.4
THE PHENOMENA OF SEXUAL PERIODICITY-3.5
FOOTNOTES
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.1
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.2
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.3
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.4
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.5
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-1.6
FOOTNOTES
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-2.1
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-2.2
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-2.3
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-2.4
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.1
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.2
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.3
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.4
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.5
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.6
AUTO-EROTISM: A STUDY OF THE SPONTANEOUS MANIFESTATIONS OF THE SEXUAL IMPULSE-3.7
FOOTNOTES
APPENDIX A-1.1
APPENDIX A-1.2
APPENDIX B-1.1
APPENDIX B-1.2
APPENDIX C-1.1
APPENDIX C-1.2
INDEX OF AUTHORS

that in bitches and rats heat can be produced by injection of extract from 

ovaries in the oestrous state (F.H.A. Marshall, _Philosophical 

Transactions_, 1903, vol. B. 196; also Marshall and Jolly, id., 1905, B. 

198). Cf. C.J. Bond, "An Inquiry Into Some Points in Uterine and Ovarian 

Physiology and Pathology in Rabbits," _British Medical Journal_, July 21, 

1906. 

 

[101] Pouchet, _Theorie de l'Ovulation Spontanee_, 1847. As Blair Bell and 

Pontland Hick remark ("Menstruation," _British Medical Journal_, March 6, 

1909), the repeated oestrus of unimpregnated animals (once a fortnight in 

rabbits) is surely comparable to menstruation. 

 

[102] Tait, _Provincial Medical Journal_, May, 1891; J. Beard, _The Span 

of Gestation_, 1897, p. 69. Lawson Tait is reduced to the assertion that 

ovulation and menstruation are identical. 

 

[103] As Moll points out, even the secondary sexual characters have 

undergone a somewhat similar change. The beard was once an important 

sexual attraction, but men can now afford to dispense with it without fear 

of loss in attractiveness. (_Libido Sexualis_, Band I, p. 387.) These 

points are discussed at greater length in the fourth volume of these 

_Studies_, "Sexual Selection in Man." 

 

[104] It is not absolutely established that in menstruating animals the 

period of menstruation is always a period of sexual congress; probably 

not, the influence of menstruation being diminished by the more 

fundamental influence of breeding seasons, which affect the male also; 

monkeys have a breeding season, though they menstruate regularly all the 

year round. 

 

[105] See Appendix A. 

 

[106] Bland Sutton, loc. cit., p. 896. 

 

[107] See H. Ellis, _Man and Woman_, Chapter XI. 

 

[108] This is by no means true of European women only. Thus, we read in an 

Arabic book, _The Perfumed Garden_, that women have an aversion to coitus 

during menstruation. On the other hand, the old Hindoo physician, Susruta, 

appears to have stated that a tendency to run after men is one of the 

signs of menstruation. 

 

[109] The actual period of the menstrual flow corresponds, in Heape's 

terminology, to the congestive stage, or _pro-oestrum_, in female animals; 

the _oestrus_, or period of sexual desire, immediately follows the 

_pro-oestrum_, and is the direct result of it. See Heape, "The 'Sexual 

Season' of Mammals," _Quarterly Journal of Microscopical Science_, 1900, 

vol. xliv, Part I. 

 

[110] It may be noted that (as Barnes, Oliver, and others have pointed 

out) there is heightened blood-pressure during menstruation. Haig remarks 

that he has found a tendency for high pressure to be accompanied by 

increased sexual appetite (_Uric Acid_, 6th edition, p. 155). 

 

[111] Sir W.F. Wade, however, remarked, some years ago, in his Ingleby 

Lectures (_Lancet_, June 5, 1886): "It is far from exceptional to find 

that there is an extreme enhancement of concupiscence in the immediate 

precatamenial period," and adds, "I am satisfied that evidence is 

obtainable that in some instances, ardor is at its maximum during the 

actual period, and suspect that cases occur in which it is almost, if not 

entirely, limited to that time." Long ago, however, the genius of Haller 

had noted the same fact. More recently, Icard (_La Femme_, Chapter VI and 

elsewhere, e.g., p. 125) has brought forward much evidence in confirmation 

of this view. It may be added that there is considerable significance in 

the fact that the erotic hallucinations, which are not infrequently 


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