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• Q: How many mice does it take to screw in a lightbulb?
  A: Two, but I don't know how they got in there....
• How many Iraquis does it take to screw in a lightbulb?
  - Two. One to screw it in, and one to screw it up....
• On a related topic: Q: How many psychoanalysts does it take to screw in a lightbulb?
  A: How many do you think it takes?...
• How many Marines does it take to screw in a lightbulb?
  Fifty. One to screw it in and the other forty nine to guard him....
• How many Graves does it take to screw in a lightbulb? Depends on how you stack the bones.
• How many women with PMS does it take to screw in a lightbulb? Three, .. IT JUST DOES!!!!
• How many artsy blackhair college students does it take to screw in a lightbulb?
  None, they'd rather be in the dark....
• How many Vassar students does it take to change a lightbulb?
  Eleven--One to screw it and ten to support its sexual orientatio...
• How many Norwegians does is take to change a lightbulb?
  Two. One to screw in the bulb and one to tell a _long_ story about it......