How many dull people does it take to screw in a lightbulb?

One.

How many Californians does it take to screw in a lightbulb?

Californians don't screw in lightbulbs, they screw in hot tubs. (I remember this from the 1970s when I was in middle school. It's one of my first dirty jokes)

How many Californians does it take to change a lightbulb?

Hella. How long does it take them Days.

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How many feminists does it take to screw in a lightbulb?

THAT'S NOT FUNNY!

How many of my ex-girlfriends does it take to change a lightbulb?

One. Apparently she will screw anything.

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How many dull people does it take to screw in a lightbulb?

One.

How many dull people does it take to change a light bulb?

One