21 young adult behavior

I remembered I posted this question in my facebook : What shd a 21 young adult behave??
This question came into my mind after I read : My dear Andrea.
A boy turninh to 21st years old soon but he was far away separated from his mother and his mother decided to understand a first 21 years old friend in her life where he's trying to know his mother from the beginning.

Sometimes, I wonder why most of the Asian parents cant communicate with their children. Their words are more in ordering than advise or encourage.
When I flashed beck my life in the past 20 years. I'm so glas I was staying with my grandparents since my kindergarden until the day she passed away. Her leaved had caused a big change in my life. I have to move back to my own house which I'm not familiar with. I had to leave a house where I stayed for 12 years which fulled with my memory and move in MY House.

My parents had never experience babyseat a baby from age 0 until 12 years old because fatty bro and me were take care of my grandmother. When the time we move back to own house, my fatty bro already went into primary school so they missed the developing stage of two children then they faced super duper lot porblem in educating my youngest brother. He's the most headache person in out family even my father also cant control him at this age. He's only 12 this year. You can just imagine how 'good' his behavior is. PArents don't understand they keep using the same method in educationg the three childred which were borned in different stage of environment. Lately 80's, early 90's and lately 90's.

Three children with different background ( especially technology environment), develope in different background. The latest a child was born the more complicated a child minded is. Sometimes, I was wondering what food they ate when they were in growth age?! Why are they so different from us?! This question I wished a professionist could help me up.

Being a parents we must learn as well. We learn to educate our child, educate them based on the environment. As I always said : Only environment can make a man change , a man cant change the environment'.

The situation in my family, I don't know how to help because I'm not being a parents yet.
As a sister for him , I'm already complete as a role model.
As a daughter in a family, I already try my best to make my parents proud of me.

I hope as a wife n a mother in the future, I will try my best do not let this situation happen again in my life because I don't want my life being repeated again.