"I get a whole age range, and a lot of letters from men," she said. "They are relationship questions like the loss of desire, or, 'I still want my partner, but they don't want me.'"
When the book launched in Britain, took two hours of calls from readers on her radio show. "Some were so basic, just so basic -- 'I've been with my girlfriend for three months and I know this thing called the clitoris, but I don't know where it is.'"
"The point is, there is an awful lot of information in society, but the problem is a lot of it is inaccurate, useless or positively harmful," she said. "On the Internet a man can see a photo image of women, but it would not help his sex life."
In rewriting the original "Joy of Sex," Quilliam's feminine perspective reflects much of what has changed in the world of sex in 36 years.
"The thing that was completely missing because we didn't know about it was the importance of the clitoris and the way men and women have come together," she said. "Their views of sex have crossed over. Women really love sex, and men can be very emotional. And that is the most hopeful message of all."