SLICK, amusing, professional and just a tad salacious, this book falls into the category of what used to be called “lavatorial literature”. While the questions might not be ones you’ve even thought of, let alone want answered, they are full of prurient fascination. Covering everything from “Are letters sent to ‘men’s’ magazines genuine?” to “Why are the men in porn movies so ugly?” — with a host of raunchy topics in between — this is a gold mine of funny sexual trivia. ( )