It's only Natural
I love that the rest of animal kingdom has a better grasp (it's short and worth a read) on gender identity and sexuality than humans:
From male killer whales that ride the dorsal fin of another male to female bonobos that rub their genitals together, the animal kingdom tolerates all kinds of lifestyles. ...
"Homosexuality has been observed in more than 1,500 species, and the phenomenon has been well described for 500 of them," said Petter Bockman, project coordinator of the exhibition.

It's amazing how reasonable creatures become when religion is taken out of the mix.