hmm...wouldn't be surprised if there's a Terry Pratchett in there, but I've only read about 10 of his 40+ books...;)

Light bulb jokes (don't know why, but Compuserve had hundreds of them back in the 80s)

How many New Yorkers?  - 50. 50? yeah, it's in the contract, 50.
New Jersians (is that a word?) - 3; 1 to change the light bulb, and 2 to kill the witnesses
Feminists? that's not funny!...;)
Surrealists? - 1 to walk the giraffe, and 1 to fill the bathtub with jello
Psychiatrists? - only 1, but the lightbulb has to want to change
Apple engineers? - 1. He holds it in place, and the world revolves around him
Lead guitarists? - 38; 1 to change the light bulb, and 37 to say how much better they would have  done it
Drummers? - none. We have machines that do that now
Viginians? - 3; 1 to change the light bulb, and 2 to talk about how much better the old one was
Fundamentalists? - 3; 1 to change the lightbulb, and 2 to testify that it was lit from the moment they began s**wing it...;)
ok...that's enough...;)

I wish I'd said that.. The Staircase Wit

anahl nathrak uth vas betude doth yel dyenvey..;)