As put forth numerous times...there is currently sexual harassement regs for folks saying inappropriate things and staring. Common sense says that those things done by a homosexual would also be grounds for harassement charges.
The barring of blacks and women from jobs they could physically do was due to attitudes of those stopping them from serving, the same way that barring gays from jobs they can physically do is attitude based. It doesn't matter whether blacks don't have a choice or women don't have a choice, what matters is the road block is based on the attitudes of those in power.
It is great that someone knew twins where one became gay and one remained straight, however things like cancer, alcoholism, and other genetic diseases predispositions have been shown in just one in a set of twins, if I remember from a NOVA show I watched on twins (I am a twin, so I had a vested interest). There was speculation on why, but it could have been environmental influences.
Researchers are still looking at causes of sexual orientation, whether biological, prenatal hormones, prenatal stress, birth order and other stuff. The American Psychaitric Association has stated "some people believe that sexual orientation is innate and fixed; however, sexual orientation develops across a person’s lifetime." They go on to state "most people experience little or no sense of choice about their sexual orientation."
A neighbor's kid was 6 when I moved in to my first duty station; he was slightly effeminate and displaying more "feminized" traits when playing with other kids, and in his interests. By the time I left 3 years later, it had become more pronounced. We still keep in touch with his mom, and about 4 or five year ago when he was 19 he came out to his parents. I'm unsure when he made his "choice"; perhaps while watching Transformers or Thundercats.
Well if we want to play the it's not a choice game let's reexamine why we deem homosexuality as acceptable human behavior if you are so inclined.
The following article was written several years ago but is fascinating in that it is revealing of a possible master gene regarding sexual preference.
http://www.nytimes.com/2005/06/03/science/03cell.html
While it refers to fruit flies it is important to take note that fruit flies do share quite a bit of genetic code with humans although the difference is quite substantial. If such a master gene is in existence in fruit flies as is suggested in this article then one can reasonably assume that it exists in humans and that it is a mere matter of time before it is identified and manipulated.
The article also gives a brief description of how the environment affects sexuality and how rejection has an influence on future sexual behavior in the fruit flies.
The mere fact that there could be a master gene would allow one to infer that a homosexuality is indeed a sexual disorder. Whether one chooses to have it corrected is not what I'm interested in discussing.