Episode 47: No you can't use NFP Selfishly

Craig discusses a recurring issue in Catholic moral circles regarding whether it's possible to use Natural Family Planning (NFP) and other fertility awareness methods in a "selfish" or sinful manner. Craig plays clips from two recent episodes that touch on this topic. Craig discusses his view that living the Church's teaching on marriage and intimacy, especially for wives, seems to require a heroic level of effort, and that it does not seem to follow that everything that falls short of that ideal should be considered sinful. Others disagree. What do you think?