What constitutes a “real” man or woman in the twenty-first century? Since birth control pills, erectile dysfunction remedies, and factory-made testosterone and estrogen were developed, biology is definitely no longer destiny. In this penetrating analysis of gender, Beatriz Preciado shows the ways in which the synthesis of hormones since the 1950s has fundamentally changed how gender and sexual identity formulated, and how the pharmaceutical and pornography industries are in the business of creating desire. This riveting continuation of Foucault’s The History of Sexuality also includes Preciado’s diaristic account of her own use of testosterone every day for one year, and it’s mesmerizing impact on her body as well as her imagination.