Zhana Vrangalova, PhD, is a NYC-based sex researcher who studies casual sex, nonmonogamy, and sexual orientation. She holds a PhD in Developmental Psychology from Cornell University, teaches Human Sexuality at New York University, shares new sex research on social media, and runs the Casual Sex Project, a place for people to share their true hookup stories. She provides daily sex education using the live video streaming app Periscope, and is currently writing a book about the science of healthy hookups.