Related:

• How many psychologists -- does it take to change a light bulb?
  Just one, but the light bulb has to really WANT to change....
• How many poltergeists -- does it take to change a light bulb?
  Three. One to unscrew the old bulb and drop it on the floor, one to put the new bulb in, and one to move a few more things about just for good measure....
• How many Russian leaders -- does it take to change a light bulb?
  None, the old bulb is just suffering from a cold....
• How many Borg -- does it take to change a light bulb? None, they just assimilate the bulb.
• How many election canvassers -- does it take to change a light bulb?
  None. They'd just go round telling everyone that it's time for a change but the only way this can come about is if everyone votes for "New light bulb....
• How many lawyers -- does it take to change a light bulb? How many can you afford?
• How many nihilists -- does it take to change a light bulb? There is nothing to change.
• How many drunk Irishmen -- does it take to change a light bulb?
  100. One to hold the light bulb, and 99 to drink until the room starts to spin....
• How many programmers -- does it take to change a light bulb?
  One, but you can never change it back again....