It's been a very long time since I had an EX.  I've been married 22 years now.  Do you know much about those relationships.
I know the term can sometimes have a derogatroy meaning, bringing up unrequited feelings
Yes, I can see how that would happen.  I think many people may have issues due to past relationships.
Ex can mean a few different things besides an former romantic partner.  Such as ex friend or ex co-worker
Ah, I never thought about it that way.  I do have some ex-coworkers.  You really lose touch when you don't work together anymore.
It still is probably most commonly used in reference to an old girlfriend or boyfriend.  Otherwise known as partner or significant other
That's what I first thought of when I heard 'ex'.  I bet there are some interesting revenge issues if the ex is upset about the break up
It probably isn't as bad as some of the stuff that happens on As the World Turns, which aired from 1956 to 2010