EPISODE 29: Interview with Dr. Elisabeth Sheff (Part One). Dr. Elisabeth “Eli” Sheff is the foremost academic expert on polyamory in the US, and the worldwide expert on polyamorous families with children. An expert witness and Guardian Ad Litem with a background in academic sociology, Dr. Sheff specializes in gender and sexual minority families, kink/BDSM, and issues facing trans* people. She is the CEO and Director of Legal Services at the Sheff Consulting Group, a think-tank of experts specializing in unconventional and underserved populations.