PhD in Sexology and Psychosexual Counseling. For More Info WhatsApp- 9604715783/9359863878. Nutrition is needed throughout life, while Reproduction is effective during a specific period. Nutrition is individual based. Reproduction needs two individuals of opposite sexes. By virtue of anatomy, physiology and hormones, the male is more pleasure-oriented and the female is more fertility oriented. Unlike nutrition, the abstinence from sexual activity is not life threatening.