Helen Gurley Brown publishes 'Sex and the Single Girl'
Shortly before Helen Gurley Brown became the editor of Cosmopolitan magazine in 1965—a role she would hold for the next three decades—the writer and editor rose to fame for her book, “Sex and the Single Girl.” This was a revolutionary read for women of the era, as it was one of the first to encourage young, unmarried women in America to not only have premarital sex, but to let themselves enjoy it. In just three weeks, the book sold 2 million copies.
[Pictured: Helen Gurley Brown in her office at Cosmopolitan magazine