I intentionally included you on the above post that cites Pope Paul VI's Encyclical Humanae Vitae. Judging from your response, I can only conclude that you did not take the time to read it through, or you would not have given this response.
People who reject the Churchs teaching on contraception, by and large, do so not because they understand and disagree with it, but largely because their commitment to a certain life-style prevents them from giving the Church a fair hearing. Nonetheless, they do offer reasons for dismissing Church teaching. They often accuse the Church of being excessively idealistic, or simply unrealistic, or out of step with the modern world, or lacking compassion for the economic and psychological hardships couples must undergo in having and raising children.
The Church teaching concerning contraception is not primarily negative, but based on a most positive understanding of marriage, sexuality, and God. Marriage, in the truest sense, is not an arbitrary arrangement, but an institution established by Christ (Mt. 19: 3 ff.; Mk. 10: 2 ff.) Marriage, therefore, is divinely instituted. This lofty, exalted understanding of marriage is nowhere better realized than in sexual union where the human act of husband and wife comes into intimate relationship with the creative act of God. Sexual union between husband and wife take place on holy ground, as it were, since it is the place where Gods creation and the married couples procreation of new life intersect.
It is most fitting, when in the presence of God, or in a holy place, to show appropriate signs of reverence. Just as God asked Moses to remove his shoes when he was standing in the Divine presence, and just as people kneel when they come into Church, it is also appropriate for married couples not to defile the holy ground which is their sexual union and intimacy with God , with the employment of contraceptive devices.
The essential purpose of contraception is to prevent the initiation of new life. The use of contraception, therefore, represents a choice that is essentially contralife. Moreover, since God is the Creator of new life, contraception is not only contralife but contra-God-the-creator.
I must respectfully, disagree with that belief.
I believe marriage is sacred, but wouldn't call it defiling to use one's reproductive capabilities responsibly.