'Sex Positions Illustrated' is just that -- descriptions and pictures of every sexual position you've ever heard of, plus one or two to grow on. It's frank, open, and honest-to-goodness serious stuff. No giggles and blushing here, folks. They're here to help us help ourselves.
(And, well, to help each other, of course. It does take two to tango, after all. And, apparently, to 'jellyfish', 'catapult', and 'corkscrew', too. Oh, my.)