I thought it was so meaniful and google abit and look what I found.
There is even an interesting article which I found rather interesting.
Hugging is a common interaction between people where bodies are brought into close contact with one another.
Hugging is used for a number of reasons. And sometimes for no apparent reason (although there is almost always an underlying purpose).
Hugging as a form of greeting is usually highly ritualized, with prescribed action and timings. These vary significantly with culture and can include variations such as:
Hugs may be used both in meeting and leaving, with different rules for how each is executed.
Read the rest here