Poker face ~ Is it so hard?

Right from school days, my dad used to warn me about showing emotions in public. He was a very emotional person(See the WAS, but Now he has changed, God I pray I somehow learn the attitude from him) ..but he always used to advise me not to turn up like him….Its always that Different Emotions have been part and parcel of my face…

Happiness is shown in full intensity and so is sadness and so is ANGER !!..

So When I am in really bad mood, every person around me can make it out and ask me tones of questions back..I don’t like to answer them but I need to answer them..

I have met quite few people who are so grounded and just have the brick face to any and every situation they face..I used to judge that they are so fake.Things have changed slowly for me to realize that being grounded is what needed now and that's more harder to accomplish…When you don’t want people to question every inch of your life, Do not show what you have in mind

When I read about these factors in Web, its suggested to put emotions in a box , lock it and see it from third person perspective…Before I could even think to put it in a box and close virtually, my face would have shown zillion expressions..

Why is it so hard?