In "Stiff: The Curious Lives of Human Cadavers," author Mary Roach explores the peculiarities surrounding human remains and the science behind cadaver preservation. One particularly intriguing aspect she discusses is the impact of embalming fluid, which can cause changes in the physical appearance of corpses, especially male cadavers. This unexpected transformation affects the size of their erectile tissues, creating a notable difference in their anatomical features compared to when they were alive.

Roach's observation highlights the surprising and often overlooked realities of post-mortem procedures. While many may not consider the effects of embalming beyond its purpose of preservation, this phenomenon raises questions about the human body and its functions even after death. The book invites readers to reflect on the curious and complex nature of cadavers, encouraging a deeper understanding of mortality and the various ways our bodies can be perceived throughout life and beyond.