@grey @Paultron Their answer about taste doesn't address the thing I've heard regarding oil and storing it in bladders back in the day. Regardless that's good to know the distinction purely for flavor exists. Our church asks us for two strict fast days and general abstinence from meat on Wednesday/Friday at minimum. Most of us do additional stuff, such as some going full vegetarian or vegan for the fast. I'm going to reduce meat and stop liquor, but I can't go vegan or I'll feel like garbage.