"Well you see, Norm, it's like this. A herd of buffalo can only move as fast as the slowest buffalo. When the herd is hunted, it's the slowest and weakest at the back which are killed first. This natural selection is good for the whole herd as its overall speed and health improves. In much the same way, the human brain can only operate as fast as the slowest brain cells. Now, as we know, excessive alcohol kills brain cells, but, naturally, it kills the slowest and weakest first. In this way, regular consumption of beer kills the weaker brain cells, making the brain a faster, more efficient machine. And that, Norm, is why you always feel smarter after a couple of beers."