" I really enjoyed Roach's other book about Space so I thought this too would be interesting. It's really only mildly interesting. While the subject is sex, it's mostly focused on the scientific aspects of sex. The book is by no means titillating (which is not a bad thing). It's very technical. Too technical. There are occasionally funny moments (especially when Roach participates in some of the research). Others comment that if you skip the footnotes, you miss a lot of good stuff. This is somewhat true, but I found the number and length of the various footnotes to be excessive and distracting (and hard to ignore when they sometimes take up half the way). There are certainly interesting characters in the book and there's some interesting background on the history of sex research. But, in the end, the book left me unsatisfied and I ended up skimming the last half of the book as it just couldn't keep my interest. "
— Anglotopia, 12/12/2013