The same holds true for the animal kingdom
More bullsh!t from a bullsh!tter.
About 10% of the animal population is homosexual. which is pretty much the rate of homosexuality in humans. Us being animals that really shouldn't surprise you.
Do some reading and you might accidentally learn something about your surroundings:
Bagemihl, Bruce (1999). Biological Exuberance: Animal Homosexuality and Natural Diversity. St. Martin's Press. ISBN 978-0312253776.
Harrold, Max (1999-02-16). "Biological Exuberance: Animal Homosexuality and Natural Diversity". The Advocate, reprinted in Highbeam Encyclopedia. Retrieved 2007-09-10.
"Same-sex Behavior Seen In Nearly All Animals, Review Finds", Science Daily
"Same-sex behavior seen in nearly all animals". Physorg.com. 2009-06-16. Retrieved 2010-11-17.
And in zoos, generally there's some poor dude tasked with the job of masturbating animals.
Or animals just wank themselves off.
It's strange, naw, not strange, pretty f!ckin dumb that you think that animals (which would include people, seeing as we are animal) when they can't find a sexual mate will 'turn' homosexual. Most people would just have a wank. What you're thinking of are called bisexuals and they tend to have sex with any willing partner, male or female.
Maybe you're bi man, and that's cool.
Go with it.