Celibate Roman Catholic Popes have been telling married faithful to use the rhythm method of family planning also known as Vatican Roulette for centuries. Large catholic families have brought home to Rome great mounds of money from this unscientific and unromantic Roman stratagem.
Professorial Ratzinger, aka Benedict 16 has been trying to strike a balance between mysticism and intellectualism in all areas of RC Theology. Thus and so, the Vatican endorsement of a new form of Natural Family Planning: Algorhythmn. Papa Panzer tried to persuade the French hardly faithful of his new mathematical method of planned procreation:
"It really works!", Benedict told zero population Europenises. "Just take the square root of your sex organ and multiply it by the Pythagorean theorem as applied to the female member's member. Then subtract that from the angle of the full moon in relation to your bedroom window. If the number is larger than one reduce it by half and that is the number of times you can engage in coitus interruptus that month."