Non heterosexuals only exist in a western cultural perspective? Hmmmm. If you say so.<quoted text>
When we're discussing animals, it's better not to use "homosexuality" or "bisexuality" and just talk about sexual behavior. I prefer the terms "same sex sexual behavior" or "opposite sex sexual behavior" though primatologists use the technical jargon of isosexual and contrasexual.
Homosexuality, heteroseuxality and bisexuality are sexual identities of Western culture. Not really applicable to animals - and not always to non-Westerners who do not identify with the Western cultural constructions of identity and sexuality.
Must be why our birth rates are so much lower.