He's so old his blood type was discontinued. -

Related:

• His toupee makes him look twenty years sillier. -
  Bill...
• Whoso sheddeth man's blood, by man shall his blood be shed.
  Old Testament -- Genesis ix,...
• Pontius Pilate & Bill Clinton:
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• As he thinketh in his heart, so is he. -- Old Testament -
  Proverbs xxiii,...
• I quit smoking and it was a very, very disappointing experience.
  I found out my teeth are really brown. -- Bill...
• As for man his days are as grass; as a flower of the field so he flourisheth.
  Old Testament -- Psalm ciii,...
• During the invasion of Sicily in World War II, General George ("Blood 'n' Guts") Patton was preparing to take the city of Palermo.
  He checked with his meteorologists and learned the...
• In Response to the Heavy Mail Department: I did not say that Dan Quayle was so dumb he flunked his blood test.
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• Bother! said Pooh,
  as he received his Compuserve bill...