Just because a couple is teaching NFP doesn’t mean they are actively using it. Perhaps they feel called to add to their family. As you can see, we have 6 children. We use NFP. None have been surprises, though. A few times we have knowinly fudged the rules and been gifted with a baby, though. It’s just a totally different mindset, when you abandon contraception and allow your body to work as God created it, when you realize the sacramental nature of the marital embrace.
Here’s my story. Dh and I are converts. When we went through RCIA and got to the part about contraception, I flinched–because I thought, how in the world will we be able to deal with having a ton of children…we want 2 and then maybe adopt or do foster care or something. But, I was grateful to not feel obligated to take the pill anymore, either, becasue it made me SO sick. **God works in funny ways. We were obedient. We took the classes. Suddenly we were ready to start a family (we had been married several years). Each child we added opened our hearts to more, even through the financial difficulites and physical difficulites. **Our middle girls are fairly closely spaced, but I’ve never felt horrified to have 2 or 3 in diapers, or to have so many young children. Some days were and are hard, but they are able to play with each other, have similar interests, support each other. I hope someday they are all great friends (right now they are in ‘sister’ mode)
NFP works for most women, if you follow the rules for abstaining. Whether you choose mucous only, sympto thermal, Marquette, temp only, whatever. If you have serious need to avoid more babies, then you HAVE to abstain by the rules. This is different than contraception, if you have serious need to not have babies, you put something on, take a pill, insert something, take a drug and then DON’T abstain–you have sex. Contraception has failure rates, too. Why does it make sense to put all your faith in laytex and chemicals and it doesn’t make sense to put your faith in the signs God has put into our own bodies? The Church is fine with controling births–thus abstinence is okay. What the Church is against is the misuse of sexuality and fertility.