As a practicing Catholic who was married in the Catholic church, I was taught that Natural Family Planning was acceptable in the Catholic Church. At our pre-Cana classes (pre marriage) we were even taught how to use NFP. (by a nun) Never did I hear that every sperm is sacred. I attend mass weekly and have 3 children in Catholic school and I have never heard this.
You and I are on the same team. I think your comment was directed at kx9088.