PhD in Sexology and Psychosexual Counseling. For More Info WhatsApp- 9604715783/9359863878. 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 has function like that of a dropper. Vagina functions like a passage. Important organ for fertility is Gonads (Testis and Ovary.), sperm, Ovum and the Uterus.