So......
Here's something for ya to think about.....
The argument that homosexuality (complete homosexuality, not bisexuality) is not a lifestyle choice, but rather genetic.... Essentially says that homosexuality is a genetic disease.
I'll pause here while some go get a nice soothing beverage and relax for a few until you have calmed back down...
Now here's my reasoning behind that statement:
If homosexuality is genetic, then that means that sexual orientation in general is encoded in our genes. Survival of the species requires reproduction.
Reproduction can only occur between the male and female of the species, regardless of what species (at least in the Kingdom Animalia). Therefore, the [attraction/instinct/urge to reproduce] with the opposite gender of the species is somehow ingrained in our genes. Additionally, the fact that reproduction also requires a female and a male gamete (egg and sperm) establishes that "heterosexual" is genetically "normal".
So. We've now established what the "normal" gene expression is in regards to sexual orientation. Something that differs from the normal, in genetics, is a mutation. Some mutations may actually improve the species. Other mutations are detrimental, and those usually result in the death of the organism, or at least the inability to pass on said genes. While homosexuality doesn't kill the organism, it does prevent passing on of said genes.
The logical progression then places homosexuality as a genetic disease.
I'll go don the asbestos underoos now....
Bryan, some genetic mutations *do* breed out in rather short order. Those are usually dominant mutations that affect the first generation to have those genes. Recessive genetic mutations are not that easy to breed out because they're not expressed if you only have one copy of the bad gene - however they can be expressed if you cross with another carrier. But even then, there's an average of only a 25% chance of the offspring of that cross getting a double dose of the bad gene.