"Well, I don't know, okay. I wasn't there when it was invented, it's always existed to me!" It's very, very obvious she is not nearly as offended or upset as she sounds. It's all for the joke. Like so many things can be with her. It's a coping mechanism, and also just her style of humor. A wham-bam, one-two punch of inescapability!

"They would say one of you was a stand-in, or it was actors or oohh-" she's literally bouncing on the couch now with her excitement at the sudden thought in her mind, "Oh, have you seen the musical? It is hilariously terrible."