Sex, that timeless subject, keeps changing, so its not surprising that Dr. Alex Comfort would revise and update his 1972 classic The Joy of Sex. More than 8 million readers bought the original edition, and this completely revamped version promisesMoreSex, that timeless subject, keeps changing, so its not surprising that Dr. Alex Comfort would revise and update his 1972 classic The Joy of Sex. More than 8 million readers bought the original edition, and this completely revamped version promises to enjoy a long and fruitful life as well.