Man, by nature is utilitarian- always drawn to the pleasurable, and withdrawn from the distasteful. This explains why he is always in search of both apriori and aposteriori arguments which may suit his views. The research which faces us, namely; the difference, if any exists, between natural family planning and contraception, is one which admits of no middle ground. Nevertheless, before we can stand in a position to state what the matter is, we need to investigate what each means in its very nature.