My program of research examines the ways that evolutionary processes have influenced the way we think and act. In particular, I investigate body satisfaction, perceptions of what is attractive, and relationship processes, and how our evolved psychology influences these perceptions. I am currently analyzing the results of several large studies (Ns = 30,000-70,000) that I have conducted in collaboration with MSNBC.com. These studies focus on social and individual factors that predict infidelity, relationship satisfaction, sexual satisfaction, jealousy, body satisfaction, lifetime number of sex partners, stress and arguments in relationships, and STD risk. More information can be found at my website.