I always write essays whilst drinking, helps the flow of ideas.
Last essay I'd had half a bottle of whisky and a couple of beers, I was a little tipsy, 82%.
But then I drink a lot so maybe my brain has adapted to function better whilst drinking.
It's funny though, read it sober, you start off quite formal and get gradually more casual as you go through. Just don't get slammed, I remember reading through one at college and I had something like
"Now without ****ing about, the current rate of economic growth is..."