THIS month, a revolutionary book on the "joys of sex" first published in 1972 will get a brand new edition, complete – for the first time – with color photos. But 36 years later, the message in The New Joy of Sex essentially echoes the old: Sex is still "serious stuff", the book's British author Susan Quilliam told The New York Times. "You sleep with somebody and it bonds you to them." When the first edition of the book appeared, it featured drawings of a hairy man and a "slightly less-hairy" woman, according to the Times. In the year 1972, few people worried about AIDS and sexually-transmitted diseases. Viagra had not been invented. Married couples in TV shows still slept on separate beds. Quilliam, a sexologist, says the new version is written for a new era. "Because we are more sexualized, we need something that is credible, accurate and authoritative."