Nature, Nurture, and Homosexuality

This is a response to Courtney's question. She asked if it is nature or nurture that creates homosexuality in a person. Everyone surely has a different opinion on the subject, but I believe it is fully related to nature. It is something that the person is born with, they don't learn it.
I have several friends that are homosexual and I've asked them what they think about this subject. All of them have agreed with me, saying that it is "ridiculous" to think that someone learns to be gay or is "turned gay." As a friend of mine just said, "It's something you are born with and discover."
Other people argue that they know many people who have been bisexual one day and straight the next. It is a valid point, I know of several people who went through that as well. I believe this is just a phase of experimentation that people go through, and may or may not reflect upon their true sexual orientation.

In class we talked about the concept of "evil", and whether it actually existed or if it is a fear or hatred we create in response to a threat. My question: Is there any true "evil" or does it depend entirely on perspective?

-Megan

"There is no normal life, Wyatt, there's just life." -Tombstone