Reposts are allowed.
Aaaand you're not allowed in my house anymore.
None, ducks are not allowed in politics.
Three. One to do it, one to complain that it has already been done before, and one to repost this joke.
Answer is 2. One to change the lightbulb while the other screams "REPOST"
Because black people can't be offended if they're only reading jokes.
People who post the joke intro twice.