Let’s face it: Natural family planning is typically thought of as a Catholic thing.

And so, when I married my wife, a non-Catholic Christian, I was a bit worried that she would not be on board with it. I guess I assumed that nobody except another Catholic who has a good understanding of the Church’s teachings on this stuff – Humanae Vitae, Theology of the Body, etc. – would agree to not use artificial contraception.

But it turns out that one does not need to be a rah-rah Catholic, or even to fully accept the Church’s teachings about why using artificial contraception is wrong, to be interested in NFP, and to ultimately decide that it’s the right choice for their marriage.

There are a number of reasons why non-Catholics may be attracted to NFP outside of the Church’s moral teachings, such as the fact that it’s effective (when practiced correctly), can be low-cost, doesn’t require...