Answer:
To present a good image on yourself and also the company that you are working at
Rome inevitably invaded Greece since Rome was far too powerful and skilled in military combat. To be free from Roman leadership, Greece supported the enemies of Rome in wars as they believed Rome will be weaker with combined enemies. And it worked, soon they were free from the Roman empire.
I believe the answer is: brain changes that greatly improve dexterity
As we are conditioning ourselves to do something with a certain part of our body, our brain would eventually improve and adjust itself to make us able to do that thing better, even on automatic function. The same thing happen to soccer youths who are continuously trained to use both of their leg to make a maneuver ever since they're little.
