The book intends to "demystify" human sexuality by exploring, without a coating of political correctness, the drivers and different varieties of human sexual behavior.
The basic message Bering evidently is intent upon putting forth is that what normal people in their normal discourse talk about as being normal sexuality (if the topic may be discussed at all) is quite far away from the actual sexual behavior that even the most "mainstream" people actually engage in.
Thus, Bering quite reasonably argues, practically every person is a pervert, or perv for short, if compared against this politically correct (and unreasonable) standard.
In addition, Bering covers a vast repertoire of various fetishes, which makes quite interesting reading as well.
Was it good?
The book is quite good: at the same time it is written in a very light and amusing style (though sometimes one may perceive the constant stream of jokes and puns even slightly excessive) and manages to be rather informative from start to finish.
After having read the book, I found it to be quite difficult to disagree with what Bering argues, i.e. that even the most normal of us "harbor secrets" with regard to our sexuality, if compared against the standards we assume in our everyday conversations.
The main take-away for me?
Put shortly, Bering's main messages are quite loud and clear, as noted above.
Who should read the book?
I think that it would be quite healthy that everyone read this book - especially the uptight (or "flower-hatted women", as they are proverbially called here in Finland) and those who have a hard time accepting that some people have sexual orientations different form their own. I believe that our society would a bit healthier in terms of its social interactions as a result of everyone having read this book.
The book on Amazon.com: Perv