Recently I saw this article on scientific american which caught my eyes: http://www.sciam.com/article.cfm?id=bisexual-species
It’s an article regarding bisexual behaviors in animals. What’s interesting about this article is that it seems to imply that it is not so uncommon for animals to engage in homosexual behavior (or what most people say: unnatural sex) as we think it is.
It appears that there is a likelihood that bisexual behavior is a natural state for these animals. In fact, animals do not actually have problems with sexual orientation. To them, that’s just sex. With heterosexual partners or otherwise isn’t that big a deal.
There’s more you can gain from this article but I don’t have time to pick them all out. (Have to start on work! boo.)
Do read the article! Have fun.