a third orientation, distinct from homosexuality and heterosexuality and can be stable. A third longitudinal study by Kinnish, Strassberg, and Turner (2005) supports this theory. While sex differences in sexual orientation stability were found for heterosexuals and gays/lesbians, no sex difference was found for bisexual men and women. Bisexuality remains "undertheorized and underinvestigated". Cultural debate The exploration on sexual fluidity initiated by Lisa M. Diamond presented a cultural challenge to the LGBT community; this is because although researchers usually emphasize that changes in sexual orientation are unlikely, despite conversion therapy attempts, sexual identity can change over time. That sexual orientation is not always stable challenges the views of many within the LGBT community, who believe that sexual orientation is fixed and immutable. There is some level of cultural debate regarding the question of how (and if) fluidity exists among men, including questions regarding fluctuations in attractions and arousal in male bisexuals. Sexual fluidity may overlap with the label abrosexual, which has been used to refer to regular changes in one's sexuality. See also Bambi effect (slang) Bi-curious Biology and sexual orientation Environment and sexual orientation List of people who identify as sexually fluid Pansexuality Questioning (sexuality and gender) Situational sexual behavior References Interpersonal relationships Sexual orientation LGBT