 in their marriage, it's usually about six years from the time they know they need help, and it's almost always too late. By that time, one of their hearts have turned to stone, and it's almost gone too far. So the key, whether it's NFP and fertility or just marriage issues in general, is get help soon. Don't wait. Yes. Do you agree? I would agree with that, absolutely. So tell me, how do you define NFP?