Related:

• How many theoretical physicists -- does it take to change a light bulb?
  If you know how many, you can't know if they've done it yet....
• How many theoretical physicists -- does it take to change a light bulb?
  If you want to know how many, you can observe them as they come in the door....
• How many psychologists -- does it take to change a light bulb?
  How long have you been having this phantasy?...
• How many light bulb jokes -- does it take to change a light bulb joke?
  Hmmmm - the probability that a given light bulb joke will be submitted to the net in any given week is ....
• How many psychiatrists -- does it take to change a light bulb?
  Only one, but it takes a really long time and the light bulb has to want to change....
• Q: How many psychiatrists does it take to change a light bulb?
  A: Only one, but it takes a long time, and the light bulb has to really want to change....
• How many psychiatrists does it take to change a light bulb?
  Only one, but it takes a really long time and the light bulb has to want to change....
• How many sorority girls -- does it take to screw in a light bulb?
  51. One to change the bulb, and fifty to sing about the bulb being changed....
• How many Mensans -- does it take to change a light bulb?
  None. The dim bulbs aren't "changed," they are humanely euthanized....