Fritz Klein (sex researcher)

Fritz Klein
Born
Fred Klein

(1932-12-27)December 27, 1932
DiedMay 24, 2006(2006-05-24) (aged 73)
San Diego, California, U.S.
Education
OccupationPsychiatrist
PartnerTom Reise
Scientific career
Fields

Fred "Fritz" Klein (December 27, 1932 – May 24, 2006) was an Austrian-born American psychiatrist and sex researcher who studied bisexuals and their relationships. He was an author and editor, as well as the developer of the Klein Sexual Orientation Grid, a scale that measures an individual's sexual orientation. Klein believed that sexual orientation could change over the course of a lifetime and that researchers underestimated the number of men that had sexual interactions with both sexes.[1] Fritz Klein founded the American Institute of Bisexuality in 1998, which is continuing his work by sponsoring bisexual-inclusive sex research, educating the general public on sexuality, and promoting bisexual culture and community.