My mom showed me an article a while ago about gay penguins at a zoo...

okay, I just found it online:
http://www.jrn.columbia.edu/studentw...-06-10/591.asp

The site also has this quote:
"Bruce Bagemihl's "Biological Exuberance," published in 1999, documents homosexual behavior in more than 450 animal species. The list includes grizzly bears, gorillas, flamingos, owls and even several species of salmon."

so homsexuality isn't 'unnatural' at all.