John N. De Lamater was a prominent American sociologist and sexologist, renowned for his contributions to the understanding of human sexuality. Born in San Diego, California, he pursued his academic journey at the University of Michigan, where he earned a doctorate in social psychology in 1969. That same year, he joined the faculty at the University of Wisconsin–Madison, eventually becoming the Conway-Bascom Professor Emeritus in the Department of Sociology. Throughout his career, De Lamater's research focused on various aspects of sexuality, and he was recognized as a fellow of the Society for the Scientific Study of Sexuality. His work significantly advanced the field, leading to him receiving the prestigious Alfred E. Kinsey award for sex research. De Lamater also served as editor of the Journal of Sex Research, where he influenced the discourse surrounding sexual behavior and attitudes. His academic legacy is marked by a commitment to rigorous research and a dedication to education, impacting both students and peers alike. Beyond his scholarly pursuits, he was known for his community involvement, including the donation of two PCC streetcars to the City of Kenosha, Wisconsin, which serve as a lasting tribute to his memory. De Lamater's contributions to sociology and sexology continue to resonate, underscoring the importance of understanding human sexuality in a social context.