Today on the show, psychology and gender studies professor Dr. Lisa Diamond shares her research into sexual fluidity and same sex attraction. She has studied how same sex attraction, primarily in women, ebbs and flows over the course of women's lives, and how that attraction influences sexual identity. We learn what sexual fluidity is, what it isn't, and why sexual identity (and the sexual attractions those identities are based on) are so variable in women. And we learn what happens when reported sexual identity and actual genital response don't align. "Most people base their [sexual] identity on what they anticipate their life path will be, and that may not jive completely with how their sexual attractions end up unfolding."