I'm from the north and now live in the south.
I feel that people in the north are generally more feudal than in the south, and more conservative about physical contact, pro sister cousin cousin sister will not have any physical contact, not to mention walking around the waist. The love sister has a shoulder to walk, but I think holding hands will be better. But generally do not hug the waist, hugging seems to be the patent of the southern metropolis of the petty capitalist.