A CHAPTER FOR MARRIED PEOPLE 509 



ducing new individuals to take the place of those who 

 die, and thus preserve the species from becoming ex- 

 tinct. 



2. In the animal kingdom generally, the reproduc- 

 tive function is necessarily a periodical act, dependent 

 upon the development of the reproductive organs of 

 both the male and the female at stated periods. 



3. In those exceptional cases in which the organs of 

 the male are in a state of constant development, sexual 

 congress occurs, in lower animals, only at those times 

 when the periodical development occurs in the female. 



4. Fecundation of the female element can only take 

 place about the time of periodical development in the 

 female. 



5. The desire for sexual congress naturally exists 

 in the female only at or immediately after the time of 

 periodical development. 



6. The constant development of the sexual organs 

 in human males is a condition common to all animals 

 in which development occurs in the female at short 

 intervals, and is a provision of nature to secure a fruit- 

 ful union when the female is in readiness, but not an 

 indication for constant or frequent use. 



7. The time of sexual congress is always determined 

 by the condition and desires of the female. 



A Hint from Nature.— An additional fact, as 

 stated by physiologists, is that, under normal condi- 

 tions, the human female experiences sexual desire im- 

 mediately after menstruation more than at any other 

 time. It has, indeed, been claimed that at this period 

 only does she experience the true sexual instinct, un- 

 less it is abnormally excited by disease or otherwise. 



From these facts the following conclusions must 

 <3vidently be drawn: 



