Is Natural Family Planning Like Praetor Not Taurum?

Natural family planning is somehow like praetor not taurum, because it's certainly not something people would do naturally. You could be using the generative faculty when you know that your wife is infertile. So in fact, you are using the faculty and you're using it in a way that is praetor Not Taurum. Maybe we can make it a third term. There's contranector maybe there's indifference with respect to nature, and then there's in accord with nature.