Premise: Sex and the Single Girl is a 1962 non-fiction book by American writer Helen Gurley Brown, written as an advice book that encouraged women to become financially independent and experience sexual relationships before or without marriage. The book sold two million copies in three weeks, was sold in 35 countries and has made the "Los Angeles Times", "The New York Times" and "Time" bestseller lists.
Hypothesis: Sex and the Single Girl was read by many people in the 1960s.