Why did you divorce/break up?

Whenever I meet someone who is divorced, I always wonder what happened. I almost never ask. It seems like it could be very embarrassing for someone to try to explain why the divorce or break-up happened.

In fact, now that I think about it, we don’t ask much of anything about the divorce. What’s happening with the kids? What about friends?

If you’re divorced, why? How did it get to that?

If you’ve broken up, why? What happened?

For everyone, what do you think are the major reasons why relationships break apart?