Madness.

I remember a friend confiding in me how she's been verbally abused by her ex.  The ex would rant and rave but after the violent episode could still have a hearty appetite. The friend postulated that some people get their energy zapping energy from others.  Much like a vampire who gets refreshed sipping blood from the drained mortal being.

In a relationship there should be no place for insanity. No moment for hysteria. No hour for uncontrollable rage.

Madness drives lovers apart, creates chasm and lasting damage. That's how divorces and goodbyes begin. 

In Sunset Boulevard, the last line of Norma Desmond was "And now, Mr. De Mille, I am ready for my close-up."  

People in rage should look at themselves in the mirror to see how rage creates an ugly creature. No kidding.