I just finished reading Kathyrn Borel's interview with Nora Ephron in the March issue of The Believer Magazine. In the brief excerpt, Ephron talks about the relationship between blogging and essay writing. Later on in the article (you will have to buy the magazine ) she mentions that looking back, a pivotol essay in her career was the "A Few Words About Breasts" published in 1973, which appeared in Esquire Magazine. In retrospect, Ephron views that essay as something that defined her as a writer who could either successfully shock readers with candidness or run the risk of being judged as writer who has crossed the boundary of "who needs to know this?" As she finished the Breasts piece, Ephron admits to Borel she didn't know how readers would react.
Coincidently bookshoppingwise, you can find the Breasts essay in the 1983 collection, The Best of Modern Humor edited by Mordecai Richler. The book includes pieces by Woody Allen, Ian Frazier and E.B. White. Knopf printed a lot of these books and you can sometimes find them for a few dollars at a used book store. (Check out the price tag on this photo.)