"A sleep expert testified at his trial that the man suffered from sexomnia, a sort of sleep walking that includes sexual acts, likely brought on by alcohol, sleep deprivation and genetics."
I'm sure there must be more to the story that just wasn't covered by the article. Perhaps someone tied him down and then injected alcohol into his veins intravenously. Since the alcohol was forced into his bloodstream against his will, and his sexomnia was "likely brought on by alcohol" (which some evil person forced into his bloodstream), among two other factors, it was therefore not his fault.
After all, sleep deprivation alone would just make me drowsy, and while genetics might make me more sexed up, a little inhibition can go a long way to solve that problem. But I can immagine that if I were already suffering from sleep deprivation and high libido, and suddenly these people wearing ski masks pulled up next to me as I was walking down the street, dragged me into their van, tied me down, injected some alcohol into my veins and then let me go wild on the town as part of a secret CIA sponsored experiment to test the combined effect of alcohol, sleep deprivation and high libido, I would hope the courts wouldn't hold me responsible for that alcohol consumption. Wouldn't you?
How' that for an explanation in his defense?
