Just noticed this while I was looking at podcastle.org - it's not clear to me what criteria is being used to rate the stories. At the moment it seems the correlation is with story length, not content, as miniatures get G and full-length stories get PG. It seems a bit odd to me that "Giant", which contains pretty clearly implied non-consensual sex, suicide by starvation, and possibly murder got a lower rating than "Come Lady Death" which has no sexual elements and only discusses death on a very figurative level.