The one I like the best to pull as a kid in the South.
I would tell Grandma, "Did you here that a preacher's wife here in town had a black baby."
She was all ready to hear all the juicy details. "REALLY! WHO WAS IT!"
"Preacher Jackson's wife!!" (black preacher)
She would say, "uhhh! Get out of here!" and give me a swat on the butt."