Nuns must be fully proficient in all forms of martial arts including Tae-Kwon Do, Judo, Karate and Pub Brawling. They are also trained in every form of kinky fetish, including sex toys, fisting, golden showers and girl-on-girl action so that they know where and when to avoid temptation. Any nun that can't drink twelve pints of "Heavy" without going to the toilet is drummed out of the order.
Nuns are great, aren't they? They're just like penguins only they don't stink of fish, and they're genuine laydez underneath. Brilliant. Let's hear it for nuns!