Fellowship in Sexology and Psychosexual Counseling. For More Info WhatsApp- 9604715783/9359863878. Man is dependent on woman for orgasm; while woman is self-sufficient. She gets quicker orgasm in woman is clitoris. Nature has designed the vagina so that man can get maximum erection of penis and ejaculate there at the mouth of the uterus so as to make the sperms available for fertility. Maximum rigidity of penis is not essential for beginning the intercourse.