This article from Crisis magazine by HW Crocker (author of "Triumph, the 2000-year history of the Catholic Church") will most likely ring true for you. He has the chutzpah to say what so many others like yourself have been feeling and thinking:
Making Babies: A Very Different Look at Natural Family Planning
The best part about an article like Crocker's is the huge relief it provides from the humorlesness of the NFP cult.
Dear Maximilian,
Your link doesn't seem to work quite right.
Thanks,
sitetest