The uterus or womb is the house of the embryo almost from the moment of conception to the moment of birth. Within the thick warm sheltered walls of the uterus the child grows, develops, eats and breathes, until all its organs and functions have reached such a stage of perfection that it can live by itself and for itself. And this may be said to be the sole function of the uterus, or at least its sole useful function. For the other function of the uterus, menstruation, cannot be said to be a necessary or a useful function. It is a normal function because it occurs regularly in every healthy woman during her child-bearing period, but not every normal function is a necessary or useful function. Not everything that is is right or useful. =Function of the Vagina.= The vagina is the canal in which sexual intercourse takes place. It receives the male organ (penis) during the sexual act, and serves as a temporary repository for the male semen. After the spermatozoa have reached the uterus, the vagina has no further function to perform. =Functions of the Vulva, Clitoris=, and =Mons Veneris.= The vulva and the clitoris have no special functions to perform; but in them, in the clitoris particularly, but also in the labia minora, resides the feeling of voluptuousness, the pleasurable sensation experienced during the sexual act. Another seat of voluptuousness in the woman is located in the cervix of the uterus. The mons Veneris has no special physiological function to perform, but it as well as the vulva serve as strong points of attraction for the male sex. While the entire female body is attractive to the male, and vice versa, there are certain zones which are especially attractive or exciting. Such zones or areas are called _erogenous zones_--the word erogenous means love-generating. The vulva and the mons Veneris are the strongest erogenous zones; other erogenous zones are the lips, the breasts, etc. =Function of the Breasts.= The function of the breasts is to nurse or suckle the young on the mother's milk until they are able to live on other food. The other name for breasts is mammary gland (in Latin, mamma--breast), and all animals who suckle their young are called mammals or mammalia. Besides its milk secreting function, the breasts constitute a strong erogenous zone; they are a point of strong attraction for the male sex, many men being more attracted by well-developed breasts than by a pretty face. There is a good biological reason for this. Well developed breasts indicate that the other sexual organs are well developed and that the woman will make a satisfactory wife and satisfactory mother. Considering then the importance of the breasts in attracting a husband and their function in nursing the young, also their erogenous properties, it is perfectly proper to class them among the reproductive organs. SUBCHAPTER C THE ORGASM