There is an interesting post on RCM about mothering, the Church and NFP. I haven't experienced or felt some of what she has, but maybe you have. Please note however that the object of her post is to be pro-active, not just to complain. It's cross-posted here, and the comments are very good.
I have had some questions arise through my own NFPing but in the end that was due to a lack of understanding on my part. At issue here could be the fact that some items are not covered as well as they should be, or are not presented clearly enough.