Editing Sexual fluidity (section)

===Bisexuality as a transitional phase===
{{See also|Bisexuality}}
Bisexuality as a transitional phase on the way to identifying as exclusively lesbian or gay has also been studied. In a large-scale, longitudinal study, participants who identified as bisexual at one point in time were especially likely to change sexual orientation identity throughout the six-year study.<ref name="Savin-Williams, R.C. 2012" /> A second longitudinal study found conflicting results. If bisexuality is a transitional phase, as people grow older the number identifying as bisexual should decline. Over the 10-year span of this study (using a female-only sample), the overall number of individuals identifying as bisexual remained relatively constant (hovering between 50 and 60%), suggesting that bisexuality is a third orientation, distinct from homosexuality and heterosexuality and can be stable.<ref name="ReferenceA">{{cite journal | last1 = Diamond | first1 = L.M. | year = 2008 | title = Female bisexuality from adolescence to adulthood: results from a 10-year longitudinal study | journal = Developmental Psychology | volume = 44 | issue = 1| pages = 5–14 | doi=10.1037/0012-1649.44.1.5 | pmid=18194000}}</ref> 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.<ref name="ReferenceB">{{cite journal | last1 = Kinnish | first1 = K.K. | last2 = Strassberg | first2 = D.S. | last3 = Turner | first3 = C.W. | year = 2005 | title = Sex differences in the flexibility of sexual orientation: a multidimensional retrospective assessment | journal = Archives of Sexual Behavior | volume = 34 | issue = 2| pages = 173–183 | doi=10.1007/s10508-005-1795-9 | pmid=15803251| s2cid = 8545091 }}</ref>

Bisexuality remains "undertheorized and underinvestigated".<ref>{{cite journal | last1 = Saewyc | first1 = E.M. | year = 2011 | title = Research on adolescent sexual orientation: development, health disparities, stigma, and resilience | journal = Journal of Research on Adolescence | volume = 21 | issue = 1| pages = 256–272 | doi=10.1111/j.1532-7795.2010.00727.x| pmid = 27099454 | pmc = 4835230}}</ref>