Literary Lightbulbs

The following comes from misscelania:

How many book publishers does it take to change a light bulb?
Three. One to change it and two to hold down the author.

How many editors does it take to change a light bulb?
"Do we have to get author's approval for this?"
Two, one to change the bulb and one to issue a rejection slip to the old bulb.

How many proofreaders does it take to change a light bulb?
Proofreaders aren't supposed to change light bulbs. They should just query them.

How many mystery writers does it take to screw in a light bulb?
Two. One to screw it in almost all the way in and the other to give it a suprising twist at the end.

How many writers does it take to change a light bulb?
Two. One to change the bulb and one to tell a long story about it.

How many literary critics does it take to change a light bulb?
Literary critics don't know how, but rest assured they'll find something wrong with the way you do it.