John, reflect on the meaning of the following word, and through that generous act of humility - of opening up - you will gain more understanding about the Catholic Church's teaching on EVERYTHING, not just the distorted view you have picked up by 3rd hand sources regarding the full purpose of marital intimacy and conjugal union. 

Here's the word:  Atonement.

Everything we do should be a happy and trusting and an abandoning act of atonement.

Atonement.

At-ONE-ment.   Unity, with God and His will.  Faith in God. 

Now tell us:  How is contraception an act of atonement?