The clinical study "Human Sexual Response" was published by Masters and Johnson in 1966, and the topic suddenly became more commonplace in America. The 1969 book "Everything You Always Wanted to Know About Sex (But Were Afraid to Ask)" by psychiatrist David Reuben was a more popular attempt at answering the public's curiosity regarding such matters. Then in 1972 appeared "The Joy of Sex" by Alex Comfort, reflecting an even more candid perception of love-making. By this time, the recreational or 'fun' aspects of sexual behavior were being discussed more openly than ever before, and this more 'enlightened' outlook resulted not just from the publication of such new books as these, but from a more pervasive sexual revolution that had already been well underway for some time.