Q: How many feminists does it take to change a light bulb?
A: That's not funny!

Q: How many college football players does it take to change a light bulb?
A: The entire team! And they all get a semester's credit for it!

Q: How many managers does it take to change a light bulb?
A: We've formed a task force to study the problem of why light bulbs burn out and to figure out what, exactly, we as supervisors can do to make the bulbs work smarter, not harder.

Q: How many pessimists does it take to screw in a light bulb?
A: None, the old one is probably screwed in too tight.

Q: How many optimists does it take to screw in a light bulb?
A: None, they're convinced that the power will come back on soon.