EPISODE 185 Interview with Leah Marshall. Leah Marshall is a relationship and human dynamics junkie and the founder and leader of the Esther Perel Discussion Group on Facebook, a community of over 12,000 members from across the globe who regularly discuss relationships, intimacy, sex, desire, and infidelity. She’s also the creator of Song Therapy, a video series hosted in partnership with the hiitide app, which breaks down the relationship dysfunction in popular songs.