"The Slowest Buffalo"

A herd of buffalo can move only as fast as the slowest
buffalo.

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, we all 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.