Wow, you are going right for the hot topics aren't you?!

It is my opinion that it is something you are born with.  I feel that there is enough scientific evidence to prove that.

Unfortunately, homosexuality is something that is misunderstood, ridiculed, and looked down upon in much of modern society.  Not as much as it used to be, but still very much more than it really should be.  If  as some people hypothesize it is a choice, why would a  human being choose to put themselves in that position.  

I think the fact that you have many people feeling the way they do despite all of their upbringing, their families values, their religions rules is proof in and of itself that it is something you are inherently born with.

My wife is a social worker and works with many people from all walks of life.  She has even worked with young adults who are going through the phase of questioning why they are how they are.  Her professional opinion as well is that it is something you are born with.  If I could have her answer this question I would because she is much more adept at the technical terms than I am.