books.google.com - "Homosexuality is an evolutionary paradox in search for a resolution, not a medical condition in search for a cure. Homosexual behavior is common among social animals, and mainly expressed within the context of a bisexual sexual orientation. Exclusive homosexuality is less common, but not unique to humans....http://books.google.com/books/about/Animal_Homosexuality.html?id=EftT_1bsPOAC&utm_source=gb-gplus-shareAnimal Homosexuality
