The School of Venus, or The Ladies Delight was originally published in 1680 as erotica, complete with illustrations. This book is a simple but adult read, and not for those easily offended by language.
In many ways this is much more than "a dirty book" and a fun read. Written as a conversation between two women; fidelity, marriage, beauty standards, and social expectation are all discussed at different points.
A prominent Admiral and Parliamentarian of the age, Samuel Pepys wrote about this book in his journal. Among other things, he said "It was not amiss for a sober man once to read over to inform himself in the villainy of the world... it did force my prick beyond stand all the while."
This book sheds light onto the social and religious norms of the 17th century. It is enlightening to any historian who wants a view of social and cultural norms of the times, as well as what was acceptably discussed by gentle ladies. It should be noted that this book has not been rewritten from the original source, rather simply translated from French to English, so as not to lose the original intent of the written word.