PG Diploma & amp; Fellowship Certified Sexologist Courses. BASICS IN SEXOLOGY Nutrition and reproduction are the essential basic instincts for all living objects. Nutrition is for self-preservation and Reproduction for the propagation of the species. To make these instincts effective, both are associated with pleasure. The only differences between these two instincts are: Nutrition is needed throughout life, while Reproduction is effective during a specific period. Nutrition is individual-based. Reproduction requires two individuals of opposite sexes. By anatomy, physiology, and hormones, the male is more pleasure-oriented, and the female is more fertility-oriented. Unlike nutrition, abstinence from sexual activity is not life-threatening. Sexual activity is controlled by Autonomic Nervous System and Hormones. • Man and Woman are 'Complementary sexes' and not 'Opposite sexes' Like a cup and saucer, Man and Woman form one unit. The function of this unit is reproduction. • "Man gives love to get sex & amp; woman gives sex to get love." • Penis functions like that of a dropper. Vagina functions like a passage. The vital organ for Fertility is Gonads (Testis and Ovary.), sperm, Ovum, and the Uterus. • Breasts are for the new-born nutrition, and hence it is the child's property. • Inner two-thirds of the vagina is developed from Endoderm, and therefore insensitive to not get an orgasm by stimulation during the intercourse. • Man is dependent on the Woman for orgasm; the Woman is self-sufficient. She gets a quicker orgasm. • Nature has designed the vagina so that man can get maximum erection of the penis and ejaculate there at the mouth of the uterus to make the sperms available for Fertility. The maximum rigidity of the penis is not essential for beginning intercourse. • The vagina is not the organ that gives sexual pleasure to a woman. As in men, orgasm is not 'the most important for women. 10% of women never experience orgasm. Women need love, pleasure, and satisfaction. • As in men, orgasm is not essential for Fertility in women. • The man decides how often, how long, and when to engage in coitus. • Intercourse is 'something giving' to the man she loves; and 'something taking' from the Woman he may/may not love. • There is no training course for becoming an ideal husband/ wife. Marriage is holy; motherhood.