James Donald "Jim" Weinrich (born 1950) is an American sex researcher and psychobiologist. Much of his work examines the relationship of biology and sexual orientation. He won the Outstanding Contributions to Sexual Science Award at the 2011 Society for the Scientific Study of Sexuality (SSSS) Western Region annual meeting. He has also won the SSSS Hugo Beigel Award for the best paper published in The Journal of Sex Research (co-authored with Richard Pillard). Weinrich served as the editor-in-chief of the Journal of Bisexuality from 2011 to 2014. He has also served on the editorial boards for The Journal of Sex Research and the Journal of Homosexuality. Life and career Weinrich earned a bachelor's degree in mathematics from Princeton University in 1972. He graduated with a Ph.D. in biology from Harvard University in 1976. He was Robert Trivers' first graduate student, and his 1976 dissertation addressed social-class differences in heterosexual behaviors, and the evolutionary adaptiveness of same-sex attraction. For the next three years, he was a Harvard Junior Fellow. He then moved to Baltimore for a post-doctoral fellowship at Johns Hopkins University with sexologist John Money. In 1983, he went to Boston to work with Richard Pillard at Boston University School of Medicine. While working with Pillard, he devised "The Periodic Table of the Gender Transposition." In 1987, he moved to the University of California, San Diego to work with Igor Grant researching effects of AIDS on the brain. He served as Assistant Adjunct Professor of Psychiatry and in 1990 was appointed the original Center Manager and Data Manager for the HIV Neurobehavioral Research Center (HNRC). He later became Principal Investigator of the HNRC Sexology Project, serving until 2000. After working for several years as an independent Internet consultant and entrepreneur, Weinrich returned to teaching in 2006, and he returned to school to earn a master's degree in psychology from San Diego State University. Since moving to San Diego, he has taught at San Diego State University, Grossmont College, Miramar College, Southwestern College, San Diego City College, National University and California State University San Marcos. Among Weinrich's contributions are the "Limerent and Lusty Sex Theory" developed with Richard Pillard, which holds that there are two kinds of sex drives, and that both exist in men and women. He and Pillard also found that homosexuality runs in some families. Selected bibliography Pillard RC, Weinrich JD (1987). The periodic table model of the