Yes, that was a typo. I meant to say "rule". The magic undergarments protect you from harm and are available to you if you can prove you are LDS. There are interviews with some famous Mormons who claim that the underwear stops bullets, keeps Satan away etc. They take the sex before marriage deal very seriously, as evidenced by the center of the BYU basketball team being suspended for the year for boinking his girlfriend.
On the Postum as beverage of choice, please Google another cult religion, the Seventh Day Adventists, who also eschew caffeine, jewelry, dancing, and all of the usual no's. I do believe that Loma Linda, CA (home of the SDA) is the only city in the US that has regular Sunday mail delivery instead of Saturday. Postum is quite popular, as are vegetarian dishes made from nuts or wheat gluten.
I've never experienced a Mormon girl before, but there could be some major magic there if you can get around the underwear.