Some of the koalas "sex sessions" involved up to five other female koalas at a time. "Our aim was to determine the extent of differences in the homosexual and heterosexual behavior of female koalas and thereby to determine the purpose of female homosexual behavior in the koala," the researchers said.
The scientists also found that homosexual behavior in koalas was restricted to females only and that they counted three lesbian encounters for every heterosexual one. Why they do it is not known. Some of the theories are for stress relief, to attract males or that hormones are involved.
Sources: The Independent, Generationq.net