Bisexualities: Theory and Research

by Fritz Klein

Unknown Binding

First published January 1, 1985

About the author

Fred "Fritz" Klein (December 27, 1932 – May 24, 2006) was an American psychiatrist and sex researcher who studied bisexuals and their relationships. He helped begin a foundation that promoted bisexual culture. 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 changed over the course of a lifetime and that researches underestimated the number of men that had sexual interactions with both sexes