In an episode of "Cheers," Cliff is seated at the bar
describing the Buffalo Theory to his buddy Norm.
For your enjoyment:
"Well, you see Norm, it's like this...
A herd of buffalo can only move as fast as the slowest
buffalo. And when the heard 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 regular killing of the weakest members.
In much the same way, the human brain can only operate
as fast as the slowest brain cells. Now, as we know,
excessive intake of alcohol 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.
And that, Norm, is why you always feel smarter
after a few beers."