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Table of contents
PREFACE
EROTIC SYMBOLISM-1.1
EROTIC SYMBOLISM-1.2
EROTIC SYMBOLISM-2.1
EROTIC SYMBOLISM-2.2
EROTIC SYMBOLISM-2.3
EROTIC SYMBOLISM-2.4
EROTIC SYMBOLISM-2.5
EROTIC SYMBOLISM-3.1
EROTIC SYMBOLISM-3.2
EROTIC SYMBOLISM-3.3
EROTIC SYMBOLISM-3.4
EROTIC SYMBOLISM-3.5
EROTIC SYMBOLISM-4.1
EROTIC SYMBOLISM-4.2
EROTIC SYMBOLISM-4.3
EROTIC SYMBOLISM-5.1
EROTIC SYMBOLISM-5.2
EROTIC SYMBOLISM-5.3
EROTIC SYMBOLISM-6
THE MECHANISM OF DETUMESCENCE-1.1
THE MECHANISM OF DETUMESCENCE-1.2
THE MECHANISM OF DETUMESCENCE-1.3
THE MECHANISM OF DETUMESCENCE-1.4
THE MECHANISM OF DETUMESCENCE-2.1
THE MECHANISM OF DETUMESCENCE-2.2
THE MECHANISM OF DETUMESCENCE-2.3
THE MECHANISM OF DETUMESCENCE-2.4
THE MECHANISM OF DETUMESCENCE-3.1
THE MECHANISM OF DETUMESCENCE-3.2
THE MECHANISM OF DETUMESCENCE-4.1
THE MECHANISM OF DETUMESCENCE-4.2
THE MECHANISM OF DETUMESCENCE-4.3
THE PSYCHIC STATE IN PREGNANCY-1
THE PSYCHIC STATE IN PREGNANCY-2
THE PSYCHIC STATE IN PREGNANCY-3
THE PSYCHIC STATE IN PREGNANCY-4
HISTORIES OF SEXUAL DEVELOPMENT HISTORY-1.1
HISTORIES OF SEXUAL DEVELOPMENT HISTORY-1.2
HISTORIES OF SEXUAL DEVELOPMENT HISTORY-2.1
HISTORIES OF SEXUAL DEVELOPMENT HISTORY-2.2
HISTORIES OF SEXUAL DEVELOPMENT HISTORY-3-4
HISTORIES OF SEXUAL DEVELOPMENT HISTORY-5.1
HISTORIES OF SEXUAL DEVELOPMENT HISTORY-5.2
INDEX OF AUTHORS

structures which were sexually undifferentiated, a fundamental analogy in 

the sexual organs of the sexes always remains; the developed organs of one 

sex exist as rudiments in the other sex; the testicles correspond to the 

ovaries; the female clitoris is the homologue of the male penis; the 

scrotum of one sex is the labia majora in the other sex, and so 

throughout, although it is not always possible at present to be quite 

certain in regard to these homologics. 

 

Since the object to be attained by the sexual organs in the human species 

is identical with that which they subserve in their pre-human ancestors, 

it is not surprising to find that these structures have a clear 

resemblance to the corresponding structures in the apes, although on the 

whole there would appear to be in man a higher degree of sexual 

differentiation. Thus the uterus of various species of _semnopithecus_ 

seems to show a noteworthy correspondence with the same organ in 

woman.[76] The somewhat less degree of sexual differentiation is well 

shown in the gorilla; in the male the external organs are in the passive 

state covered by the wrinkled skin of the abdomen, while in the female, 

on the contrary, they are very apparent, and in sexual excitement the 

large clitoris and nymphae become markedly prominent. The penis of the 

gorilla, however, more nearly resembles that of man, according to 

Hartmann, than does that of the other anthropoid apes, which diverge from 

the human type in this respect more than do the cynocephalic apes and some 

species of baboon. 

 

From the psychological point of view we are less interested in the 

internal sexual organs, which are most fundamentally concerned with the 

production and reception of the sexual elements, than with the more 

external parts of the genital apparatus which serve as the instruments of 

sexual excitation, and the channels for the intromission and passage of 

the seminal fluid. It is these only which can play any part at all in 

sexual selection; they are the only part of the sexual apparatus which can 

enter into the formation of either normal or abnormal erotic conceptions; 

they are the organs most prominently concerned with detumescence; they 

alone enter normally into the conscious process of sex at any time. It 

seems desirable, therefore, to discuss them briefly at this point. 

 

Our knowledge of the individual and racial variations of the 

external sexual organs is still extremely imperfect. A few 

monographs and collections of data on isolated points may be 

found in more or less inaccessible publications. As regards 

women, Ploss and Bartels have devoted a chapter to the sexual 

organs of women which extends to a hundred pages, but remains 

scanty and fragmentary. (_Das Weib_, vol. i, Chapter VI.) The 

most systematic series of observations have been made in the case 

of the various kinds of degenerates--idiots, the insane, 

criminals, etc.--but it would be obviously unsafe to rely too 

absolutely on such investigations for our knowledge of the sexual 

organs of the ordinary population. 

 

There can be no doubt, however, that the external sexual organs 

in normal men and women exhibit a peculiarly wide range of 


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