And there's The Buffalo Theory:
"Well ya see, Norm, it's like this... A herd of buffalo can only move as
fast as the slowest buffalo. And when the herd is hunted, it is the slowest
and weakest ones at the back that are killed first. This natural selection
is good for the herd as a whole, because the general speed and health of the whole group keeps improving by the regular killing of the weakest members.
In much the same way, the human brain can only operate as fast as the
slowest brain cells. Excessive intake of alcohol, as we know, kills brain
cells. But naturally, it attacks the slowest and weakest brain cells first.
In this way, regular consumption of beer eliminates the weaker brain cells, making the brain a faster and more efficient machine. That's why you always feel smarter after a few beers."