Scientists monitoring the marsupials with digital cameras counted three homosexual interactions for every heterosexual one. "Some females rejected the advances of males that were in their enclosures, only to become willing participants in homosexual encounters immediately after," say the researchers. "On several occasions more than one pair of females shared the same pole, and multiple females mounted each other simultaneously. At least one multiple encounter involved five female koalas.
My favorite theory: "...the females do it to attract males; [works for ME!] another (theory to explain the behavior) is that it is simply hormonal, or that it is a stress reliever.
And evidently its only the girl koalas that do it...the animal world just got weirder.