A lot of us baby boomers find this true because we have always said what we felt, up until recently.
As a Life Coach, my clients come to me with their frustrations because their position or political correctness forces them to bite their tongue or sweeten their words, when they would much rather tell someone off in no uncertain terms.
My Life Coaching clients know that if they want to vent, they can let off all the steam they like, it's called clearing.
But when I'm not available or comments need to be spontaneous, there is nothing preventing them from expressing their true feelings internally.
For instance, they might day to their boss, "sure I can do that', all the while saying in their mind, "but it is really a stupid idea!"
Or they ask a sales clerk, "excuse me, can I get some help here'? While thinking "stop messing around and do your job"!
My clients find the use of "off the wall" internal dialogue as a very effective way to release the tension and even lighten up a stressful situation. By infusing or injecting some very irreverent humor into their thoughts.
But of course, I warn them to be careful with their exuberance and just don't forget themselves and blurt it out loud! That's a whole different coaching session!!