"He said: 'I may have the genetic coding that I'm inclined to be an alcoholic, but I have the desire not to do that, and I look at the homosexual issue the same way.'"
He obviously knows nothing about alcohol addiction. Addiction, like any other, is caused by the voluntarily increased dopamine levels in the brain, which over time will cause the body to crave and depend on those higher levels. It is not genetic.
Unlike the person who "experiments but doesn't enjoy" homo sex, anyone who takes mind-altering substances has a chance of becoming addicted. And unlike the person who's tried homo sex multiple times with no enjoyment, anyone who takes mind-altering substances multiple times will become addicted...it's just a matter of time.