A variation of, "That's what she said", originated from kick-ass lead singer, Rob Halford of Judas Priest. However, Rob is homosexual, and the phrase really just mocks his sexuality. This joke is not intended to make fun of Halford, only to torment your friends that set themselves up for a "that's what she said" joke.
Everybody and Their Brothers: "What do you want for lunch?"
Ange: "I'll have a wiener as usual."
Everybody and Their Brothers: "That's what Rob said."