In this episode, Xavier Bonilla has a dialogue with Will Beischel about the most recent research on gender. They discuss their background for studying sex and gender and then provide an exhaustive analysis of the sex configuration theory. This theory includes understanding sexual orientation and its broader horizon along with three aspects including gender, sex, and gender/sex. They talk about how the social environment interacts with testosterone and power, interactions with others and some of the connections between biology and sociality for gender/sex. They talk about the traditional view of biological sex and understanding brain development in utero along with genetics to understand the variances with gender. They also talk about the roles of masculinity and femininity and how to adjust these ideas in the 21st century. 
Will Beischel has a PhD from the University of Michigan. They have a degree in biology and neuroscience and their main interest is in sexual and gender identities, with a focus on sexual and gender minorities. You can find their work here. Twitter: @willbeischel