Survival in Auschwitz (If this is a man) Steaminess Rating

Exactly how steamy is this story?

PG-13

Aside from a few mentions of nudity (and these are very general and not described in any level of detail), this book is perhaps the furthest thing ever from steamy. Sex was the last thing on anyone's mind in Auschwitz. But we're giving it an R because of the sadistic violence and horrifying scenes of sickness, death, and starvation.