Suzanne Finnamore said this quote

There is that, and there is also the Irreconcilable Differences line. It seems so catchall, so vague. You could say that about anyone, any man and woman at all. Jesus and Mary Magdalene: Irreconcilable Differences. JFK and Jackie, anyone at all. It´s built into the man-woman thing. What kind of paltry reason is that? Insanity is another box to be checked on the divorce petition, the only alternative to Irreconcilable Differences. I would like to check it.