I have issues with this book.
On one hand, there is a lot of research and a wealth of studies referenced to support what is proved or debunked. The overall tone is also pretty irreverent and entertaining, the writing easy, and acceptance is the name of the game.
Thing is, there is a lot that is biased, too local or just plain inconclusive in this book.
There are many inconclusive chapters where the bias of authors colour the wrap up. Even when I agree with the bias, it gets irksome. Oh, and I'm unconvinced some of the studies results can be parsed into proving or disproving some myths. There is a lot of talk of "linked" that sounds more like correlation than causation.
I'm not from USA, so the local bent sometimes makes the polling (specially the health ones) not as strong a prop.
Inconclusive chapters make sense where there is not enough data and studies, but it grates to see the myth counted and addressed when the final verdict is a shrug and a cheery opinion.
Still, I left with some curious facts not previously in my radar (though not nearly as much sheer info as I expected). Two come to mind: that the G spot has not been physiologically identified (like, seriously?). That PVH vaccine is to be ideally administered before any sexual activity, but can be gotten whenever (context: there is free vaccination here, and campaigns, but they are aimed at girls under 13, and the notion passed around is that getting vaccinated after certain age is useless, not that you can get vaccinated whenever, it just happens that once you are being sexually active, there is a high chance that you won't finish the rounds before contracting the virus).
All around? A bit superficial, but not bad.