Just one, but they have to steal it first.
Answer is 2. One to change the lightbulb while the other screams "REPOST"
2. One to screw it in and another to say, "I could do that".
Only one but it may take him/her more than five years to do it.
It takes two. One to change the bulb and the other to kick the switch.
A) I don't know he also stole my watch.
That's not my stile.