The New Science of Sexual Fluidity

February 26, 2017
Lisa Diamond

Jim Gill (WPR)

By the time most people reach young adulthood, even if they’re not in a committed relationship, they’re generally expected to know what kind of person they want to be with, that is, the gender of an ideal mate. Sexual orientation is widely assumed to be fixed after a certain point in early life development. But for years psychologist Lisa Diamond has been challenging that notion, and through her research offers a radical new understanding of sexual orientation, arguing that it’s much more fluid than previously believed.

This episode was produced in partnership with the Center for Humans and Nature, an organization that brings together scholars from a diversity of disciplines to think creatively about our relationships with nature and each other. What do you think evolution can tell us about love and morality? Share your thoughts at This episode was made possible through the support of the John Templeton Foundation.