0, the light bulb has to want to change itself.
E.T. learned English and wanted to go home
He didn't want to be part of a bad punch line.
Daughter: You told me to change the baby.
Sorry we closed 18 seconds ago and I've just cashed up."
N! One to change the light bulb, and n-1 to display stereotypical behavioral traits of X!
removed
Because they are both surrounded by nuts.
Clearly, I can see your nuts.