You could actually respond to his statement instead of posting some little joke to make yourself feel better.
B.B.: knock knock Me: who's there? B.B.: why it's me BrooksBall and i have something i need to tell you no to be shared with anyone else. Me: ok what is it? B.B.: I dont have a weiner at all. and i'm a jackass. Me: that's not a very good knock knock joke.