 Absolutely. All four of these methods have been developed and are taught according to Catholic teaching. Now, that's not to say someone can't take the information and use it contrary, but the core of natural family planning is aligned with Catholic teaching. Yeah, right. Well, like anything, you can abuse anything, right? You can misuse anything. So, all right. Very good. So let's talk about Catholic teaching. What does our church talk about? What does it teach?