Alphabetically organized, and quite specific in detail, it was for many of us, our first sexual experience, or, for that matter, learning experiencecarefully pulling the book down off the shelf when no one is home. By the way, they actually made a Vol. 2 with less hairy, scraggly people. See also 70's, Sex.
....and how can we make sex even sexier? See also Cosmopolitan Magazine, Sex.
Knowing euphemism for sex sometimes employed on small children, e.g., "Why do you and Daddy sleep in the same room?" "Because sometimes we like to tickle each other." See also Sex.