About chairs

This is what I notice when I ate. People tend to group themselves among what they're familiarized themselves with, be it a family, a friend, or maybe just a fellow colleague. They also have the tendencies of doing things together while they ate. I noticed some differences as long as we grow up (why we? Because it's a general knowledge).
When we were in kindergarten we sit next to a stranger and treats them as friend, while staying true to ourselves, be it the way we eat, the way we sit, the way we talk, or even our own habits. We never have to pretend, we never really care about who's sitting next to us as long as we are happy. We are carefree.
As we grow up, we go to school, we learn what is appropriate, what is polite, what the society thinks, and it became a doctrine. We started to define ourselves according to the society, the majority.
In primary school we started to group ourselves, we only want to sit next to someone we know, if we don't know we still are able to make friends with them. By the end of primary school we grouped ourselves and the stereotyping began.
In high school, we often see people grouping themselves, and when someone new comes to school that person will try the place or group that he/she could fit in. At this times, stereotyping play its role. People try their best to be accepted in the majority that they think are cool, although some of them stays true and usually becomes an outcast.
By the end of university we've become doctrinate, of course we can also differentiate what is good and what is bad. In this way we are ready for the society to take us in. However one thing stays true, by this time we totally alienated ourselves from strangers. Not wanting to know them, not wanting to sit next to them unless we really have to. By this time we only want to sit next to those we really are familiar with, those we are comfortable with, and starting to not care about others. There are still some who care, and we call them by names, or maybe heroes.
So what is up with the universe? What have this world comes to? We are the one making the rules, and yet we keep on changing them whenever we feel convenient. We throw off our carefreeness for a doctrine which is not perfect, which is humane. But then again we are humans, we are what we define we are. We decide with God's help what is wrong and what is right...hold on...is it that fruit that causes this mess? Oh well...there are nothing we can do about that right now right?
The point is we can only learn, observe, and pour our thoughts while hoping that this world will be a better place for us, for the mankind as well as the others inhabit it.