Alcohol slows things down and gives you that idgaf attitude
I'm not saying that's always good, but for some people it's helpful. If I'm doing a math problem (GRE prep) sober, my mind will move at a quicker pace, but I might also be more conscious of everything else. After a few beers that are consumed very quickly? My mind will slow down, but it'll be clear and free-flowing. I won't be hesitant, I'll just say, "F--- it, let's use this formula. If it's wrong, well I wasted time and might be screwed, but whatever. Let's do it. "