Bruce Bagemihl is a Canadian biologist, linguist, and author of the book Biological Exuberance: Animal Homosexuality and Natural Diversity.
[5] Bagemihl proposes that group cohesion and lessening of tensions, seen for example among bonobos, are other important functions of sexual behavior.
[6] He also argues that the implications for humans of homosexual behaviour across the animal kingdom are "enormous.
"[5][6] His book on homosexuality in animals was cited by the American Psychiatric Association and other groups in their amici curiae brief to the United States Supreme Court in Lawrence v. Texas,[7] the case which ultimately struck down sodomy laws across the United States.
[8] He has also published several essays and scientific articles on issues related to language, biology, gender, and sexuality.