How many Princeton students does it take to screw in a light bulb? Two. One to mix the martinis, and one to call the electrician. Ivy League light-bulb jokes tend to be funny because they're at least ...

How many [fill in the blank yourself] does it take to change a light bulb? The original answer to the joke is, “Three,” with the punchline being “One to hold the bulb and two to turn the ladder.” An ...