I don't think I have written a poem when I was completely sober. But I have written a few good ones or a few bad ones under the hammer of a black hangover when I didn't know whether another drink or a blade would be the best thing.
The hangover was brutal but he didn't mind. It told him he had been somewhere else, someplace good.
I like to change liquor stores frequently because the clerks got to know your habits if you went in night and day and bought huge quantities. I could feel them wondering why I wasn't dead yet and it made me uncomfortable. They probably weren't thinking any such thing, but then a man gets paranoid when he has 300 hangovers a year.