Communication.

Communication, really, is the first thing we learn in life.
( Quoting Meredith of Grey's Anatomy )
And it seems to be easier doing it while we're younger. Because when we grow old, the right words hardly pops up. Whether you're asking, answering, explaining or any other sorts of communication. The older you become, the harder it gets.
Even worse, wrong choice of words bring unbearable consequences.
So some people just avoid it. Some people are just not good at it.
Are they to be blamed? Whose fault is it? If it's not theirs, why are they getting stoned for doing so? If it's theirs, why don't they do something about it?
Communication, probably, is the last thing we'll master in life.