Couple more... Forgive me if they're lame. Just stuff that comes across my office e-mail...

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, 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.
And that's why you always feel smarter after a few beers.
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A husband and wife were having dinner at a very fine restaurant when
this absolutely stunning young woman comes over to their table, gives
the husband a big kiss, tells him she'll see him later, and walks
away.
His wife glares at him and says, "Who was that??!!"
"Oh," replies the husband, "that was my mistress."
The wife says, "That's it; I want a divorce." "I understand," replies her
husband, "but, remember, if you get a divorce, there will be no more
shopping trips to Paris, no wintering in the Caribbean, no Lexus in the
garage, and no more
country club. But the decision is yours."
Just then the wife notices a mutual friend entering the restaurant with a
gorgeous woman. "Who's that woman with Jim?" she asks.
"That's his mistress," replies her husband.
"Ours is prettier," says the wife.