Like this.
Three. One to post it, another to post a better punchline in the comment section, and another to repost it with the new punchline.
Three. When you tell it to her, then when you explain it to her, and then when she gets it.
A dun-GIN keeper. Edit: You have my permission to post this on r/dadjokes
Like we're going outside...
Three. One to post it, one to make a better punchline in the comments, and one to repost it the next day.
Because their jokes weren't very funny.