Lisa M. Diamond

Lisa M. Diamond is an American psychologist and feminist. She is a professor of developmental psychology, health psychology and gender studies at the University of Utah. Her research focuses on sexual orientation development, sexual identity, and bonding. In this book, she discusses the fluidity of female sexuality, based on her study of 100 nonheterosexual women over a period of 10 years.

Early life Diamond became interested in feminism after Betty Friedan gave a talk at her high school. During this time, she came out as gay and decided to pursue research into homosexuality instead of activism. where she earned her M.A. in 1996, and her Ph.D. in 1999, both in human developmental psychology. She serves on the editorial boards of Developmental Psychology, Archives of Sexual Behavior, and various other journals. The sexually fluid women she studied did not "experience those changes as willful", and some even resist them. Sexual Fluidity was also a finalist for the Lambda Literary Award for Bisexual Literature.