The researchers Roach encounters (and whose experiments she and her husband participate in) are kind of a strange lot. But you have to value the work they do. I'm glad someone is out there studying how to have better sex.
Roach reviews the research done into human (and often animal) sexuality as far back as records are kept. Some of her juicier finds are at the U.S. Patent office, and others are in the strange opinions of Victorians, Catholic dogma, urologists' offices, and doodles in Leonardo DaVinci's engineering drawings.
I highly recommend this book for anyone who enjoys science, history or (God forbid) sex. Mary Roach is a great author who makes sense of scientific jargon and puts herself into all kinds of strange, potentially humiliating situations for her reader's benefit.