Personal Space

Koreans require less personal space than American.
Why is that?

After the Korean War was over, we didn't have anything to eat.
Korean sentiment is that we should share our food even though it is small in quantity.
Koreans have strong affection which is called "Jeong".
Korea women usually talked to close neighbors about their a little bit private complains.
Neighbors listen to her story, agree enthusiastically.
It's ordinary to share emotions by talking about their happy or sad story.
If someone is in a difficult circumstance, we are willing to help them

But, In american, People think it's personal thing to talk about their story, family, girlfriend and so on.
Because of this, Americans couldn't get close each other.