Couldn't agree more with Michael. These posts are difficult to read and is the result of a sex crazed society.
Regarding comments, my wife and I practice the 'alternative method' and speaking from EXPERIENCE, IT IS EFFECTIVE. In fact, if you look at the numbers, it's more effective than IVF for achieving and 99% effective in preventing. Like all things, you have to understand what you're doing. Also, it is not from the 'word of a celibate man' but is from years of medical research. Here is one (http://naprotechnology.com/).
So many of us are so quick to eat genetically engineered food or take contraceptives that may increase our risk of cancer (source:http://www.cancer.gov/cancertopics/factsheet/Risk/oral-contr...) but we aren't interested in a safe approach, which also is (and more importantly) falls into God's plan. If you read Humane Vitae or other church documents on the subject, it makes perfect sense. No really, just read it. It's a short read. http://www.vatican.va/holy_father/paul_vi/encyclicals/docume...
The church does not have an obsession with sex. Rather, mankind has the obsession with sex and the church is trying to help us understand it's proper place. Since contraception has been widely adopted in the US, divorce, STDs, rape and illegitimate children has sky rocketted. Very unfortunate, but predicted in the 1960s in Humanae Vitae.