To respond to that situation, a team of women have created the "I Use NFP" website, a comprehensive resource for all things NFP, starting with a helpful description that highlights just how counter-intuitive NFP can be:
Natural Family Planning (NFP) is a lifestyle choice people make for a multitude of reasons. Some people come to it for religious reasons, some people come to it so they can be a better steward to the earth, and some people come to it as a last resort in their infertility journey. Regardless of why a couple chooses natural family planning the goal is that they learn the innate goodness of a woman’s body and her natural fertility.
Though the site is expressly created by women, for women, men's voices are not entirely silenced. Be sure to get James' story on what he learned about his wife from tracking her fertility charts (a "job" many NFP husbands assume): " I never expected NFP would help me understand what is really going on with my wife."