Helen E. Fisher (b. 1947) is an American anthropologist (Rutgers University) and human behavior researcher of the biology of love and attraction. She was hired as the chief scientific advisor to the Internet dating site, Chemistry.com, a division of Match.com. Fisher has conducted extensive research and written five books on the evolution and future of human sexuality, monogamy, adultery and divorce, gender differences in the brain, and the chemistry of romantic love.