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• How many SAS men -- does it take to change a light bulb?
  Three. One to change it and two to shout GO! GO! GO!...
• How many blondes -- does it take to change a light bulb?
  Three. One to hold the light bulb, two to spin the ladder....
• How many police -- does it take to change a light bulb?
  Three. One to change it and two to direct traffic (eh?)...
• How many drummers -- does it take to change a light bulb?
  One .. Two, and a-one two three fou...
• How many philosophers -- does it take to change a light bulb?
  Three. One to change it and two to stand around arguing over whether or not the light bulb exists....
• How many circus performers -- does it take to change a light bulb?
  Four: One for the money, two for the show, three to get ready, and four to go!...
• How many waitresses -- does it take to change a light bulb?
  Three. Two to stand around bitching about it and one to go get the manager....
• How many archaeologists does -- does it take to change a light bulb?
  Three. One to change it and two to argue about how old the old one is....
• How many blacks -- does it take to change a light bulb?
  Three: One to boogie up the ladder, two to keep the beat....