Today’s entry in the “everything is grist for the writer’s mill” department: a decidedly NSFW illustrated article on a 1680 sex manual that even shocked Samuel Pepys. (But he read it anyway, the horndog.)
For the prurient or dedicated researcher — not that the two are necessarily mutually exclusive — the article includes a link to the full version of the text as digitized on Google Books. Because you never can tell what you might need to know someday.
Dr. Doyle's Blog 
I didn’t know it was possible to scandalize Samuel Pepys, given that he sometimes played pocket pool in church and then mentioned it in his diary! Thanks for the link… Indeed, you never know. 😉