What do we really know about sex? How often do we do it and in which positions? How do we choose our partners? Do women actually fake it? If so, how often? And have we become a nation fueled by “hook up” culture? “Sex in America,” part of Discovery Channel’s award-winning CURIOSITY series, reveals the results of the largest sex survey ever conducted and delves into some of the newest, most controversial sexual experiments to shed light on its findings. The results, some revealed for the very first time, will uncover what’s really happening when the lights go out.