Recently, a few friends with long term relationships have walked away. These are people who have been together for decades, raised kids... the whole thing. Now, when things are supposed to be getting easier, they've had enough. So I'm wondering, what happens to cause a split after all that time? And what would be your last straw. As a side question, do you think it would be easier to handle an emotional affair or a physical one? Could you be more forgiving of one or the other? Are either of them deal breakers? Other than the really obvious (abuse, criminal actions), what would mean The End for you? Or maybe people just aren't 'made' to be together for life, now that we live longer than when the 'rules' were made.

What do you think?