I read this book so long ago, I must admit, the facts that I've read about here have mostly flown out of my head. I have horrible retention when it comes to non-fiction. But what does stick with me is that it was fun, funny and flippant. Mary Roach has a way of making any subject matter (whether it be the dead as in Stiff, or sex as in this case) fun to read about.
I have this friend who tells the most awesome and strange stories about her experiences. It is sometimes so absurd that you have to wonder if she is not stretching the truth a bit to make it more interesting. But no, it's just the way she l0oks at the world. She thinks everything is amusing and interesting and it translated to how she talks about her experiences. Reading this book gave me that sort of feeling. It felt like Roach delving into the world of sex research was a big adventure. I mean, sex research in itself would seem to be pretty interesting but the author makes it even more so.
Basically, though I may have forgotten most of the fact that I learned, I do vividly remember that it was a really funny and quirky book which kept me interested throughout.