Sexual self-control can help build the marital relationship and therefore most couples report that NFP has a positive effect on their marriages. They find that periodic abstinence helps keep their sexual relationship fresh, improves their communication, and gives them a deeper respect for each other.
In addition, the practice of NFP helps to develop the same strength of character that is necessary for marital fidelity and lifelong marriage. NFP couples have an extremely low divorce rate. This makes sense because couples who respect the natural moral law, God’s order of creation, can expect to enjoy its benefits.