I seem to remember a pair of homosexual chinstrap penguins that lived in a zoo in the U.S. These 2 male's raised a baby penguin from the time it was an egg. Homosexuality has also been observed in rats I believe.
So homosexuality is not strictly a human oddity. It can be observed throughout the animal kingdom. I say this because rats and penguins have primitive brains. They are not being gay just for the fun of it, or through conscience choice or fad. God allows animals to be homosexual but not humans?