It would be seen as not being normal as the normal for most humans is to other sex attracted. While homosexuality may occur naturally, it is just not the norm but a deviation from the norm. If you ask people it is not something that they would seek in a child. Look being an alcoholic is genetic as well. It is called an addictive personality. Again if we had the option, most people would want to screen out most of these genetic deviations.
Wow. Just wow. "I don't want a gay kid, or a red headed kid, or one that has 11 toes, or blah, blah, blah"...what do you mean by screened out? Aborted? Genetic testing with the parents?? I'm glad my mom and dad, if they would have had the means, didn't "screen" me out of existence. Now if there was a way to screen out a-holes, the world would certainly be a better place.