Dear John, I Love Jane: Women Write About Leaving Men for Women

The new buzzword in female sexuality is "sexual fluidity”: the idea that for many women, sexual identity can shift over time, often in the direction of same-sex relationships.

Examples abound in popular culture, from actress Cynthia Nixon, who left her male partner of 15 years to be with a woman, to writer and comedienne Carol Leifer, who divorced her husband for the same reason. In a culture increasingly open to accepting this fluidity, Dear John, I Love Jane is a timely, fiercely candid ex...