More light bulb jokes

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Q: How many perfectionists does it take to change a lightbulb?
A: None. They changed it before it broke.

Q.  How many pessimists does it take to screw in a lightbulb?
A.  None. They'd rather curse the darkness.

Q: How many psychiatrists does it take to screw in a light-bulb ?
A: One, but the light-bulb has to really want to change.

Q: How many psychoanalysts does it take to screw in a light bulb?
A: How many do *you* think it takes?

Q: How many members of The Royal Family does it take to change a light bulb?
A: Don't ask stupid questions.

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

Q: How many schizophreniacs does it take to screw in a light bulb?
A: Both of us.

 

A: One.
Q: How many time-travellers ( time-travelers)
    does it take to change a lightbulb?