How many__________ to put in a lightbulb?
Engineers: One, but it comes with a three hour lecture on the history of the bulb
Jews: Two. One to do it, one to tell you his brother-in-law owns a lightbulb factory and could have got it for you wholesale.
Germans: One, but only if you order him to.
Irish: Six. One to do it, five to reminisce about what a grand light the old bulb was.
Klingons: None, warriors do not do the work of menials.
Frenchmen: I give up, how many DOES it take?
Lawyers: As many as you can afford.