I study human behavior from the perspective of evolutionary psychology. My recent research focuses on two main areas. In the first, I examine how women’s experiences, desires, and behaviors change across the ovulatory cycle. I am particularly interested in discovering the “hidden side of female desire” that reveals itself only at peak fertility within the cycle. In the second, using error management theory, I explore the hypothesis that evolution has shaped biased social judgment strategies that can lead to systematic errors including miscommunication between the sexes.