After getting over the giggles and settled down to read this seriously, I found this book educational, interesting and jaw-dropping. If I'd recorded the soundtrack of me reading this it would be full of giggles, gasps, oh my gods and ewws. Anyone listening would assume I was Bonking, instead of reading about it. Mary Roach fully immerses herself in her research, even taking part in some studies to experience the experiments for herself. I feel for her husband. Being married to her can mean finding yourself chatting to a strange man watching you having sex with your mad wife inside an MRI machine.Her witty commentary on the history of sex research shows the people behind the white coats weren't all perverts and had a genuine scientific curiosity about sex, the most taboo subject in the world no matter time or place you live in. The negative effect this had on both their careers and their personal lives was sometimes staggering. However, some of the experiments on animals...err...well, they were uncomfortable to read. Roach only reported on the humane ones but even those -I was questioning where the line between science and bestiality is, if there is one. I'm sorry, researchers but there was a gigantic EWW! moment involving a female primate. It was too weird.Being female I was most interested in the female chapters than the male which tended to drag for me although penis re-attachment surgery was most...enlightening. *coughs to hide smile*Certain statistics, anecdotes and trivia (e.g. items removed from naughty places that can't be explained without embarrassment) were spread throughout the book, many of which were in the footnotes so whatever you do, pay attention to those even if you, like some, don't particularly like Roach's writing. Her sense of humour won't be to everyone's taste, for me it's more hit than miss but I can understand why some see it as forced, trying too hard to evoke a laugh from her audience.In an ideal world I'd want to give this to teenagers as part of their sex education. Anyone who might assume this is just some smutty perverted book just by looking at the cover, is wrong. Neither is it dry and boring, there will be no Zzzz's whilst reading this. If anything I'd warn people: You must have a strong stomach. There are graphic descriptions of surgical procedures that will have you involuntarily crossing your legs in sympathy.So if you want to read about how men get erections, why some women orgasm and others don't then this book is for you. Have fun and try not to puke.