Simpsons refrence, obscure and unexplained.......?

"So I says to Mabel I says..." I always wondered where this Simpsons line came from, and after checking, here's where it came from: It's an allusion to the book The Great Gatsby by F. Scott Fitzgerald. At one of the parties, Gatsby meets two women already in conversation. We overhear this segment "So I says to Mabel, I says... I'll continue this later." Gatsby and the woman have a quick chat and Gatsby leaves. As he's leaving we hear the line again, "So I says to Mabel, I says..." This is mirrored in the episode, where Bart and Lisa are conversing, and Homer is the interrupter.