can it be called "unnatural"? http://en.wikipedia.org/wiki/Animal_homosexuality
In fact, in some species, it's really high. Apparently 94% of all observed sex in Giraffes is gay.
'Giraffes
Male giraffes have been observed to engage in remarkably high frequencies of homosexual behavior. After aggressive "necking", it is common for two male giraffes to caress and court each other, leading up to mounting and climax. Such interactions between males have been found to be more frequent than heterosexual coupling.[62] In one study, up to 94% of observed mounting incidents took place between two males."
In fact, in some species, it's really high. Apparently 94% of all observed sex in Giraffes is gay.
'Giraffes
Male giraffes have been observed to engage in remarkably high frequencies of homosexual behavior. After aggressive "necking", it is common for two male giraffes to caress and court each other, leading up to mounting and climax. Such interactions between males have been found to be more frequent than heterosexual coupling.[62] In one study, up to 94% of observed mounting incidents took place between two males."