What's the verdict on shrink wrapping soap? I've seen some mixed reviews. I've noticed some of the very experienced people on this site shrink wrap their soap. But others do not. Those that do not use: "The soap needs to breathe" as the primary reason. So, why does the soap need to breathe? What could happen if it doesn't? I initially thought that shrink wrap may help preserve scent, but does it? What are the pros/cons of shrink wrapping vs. not?