1) Burping at the end of a meal. In my opinion, it is very rude in my culture because it is shame and it is not respecting to other guests and burping infront guests in dining table is vary bad habt in my culture and it is unacceptable manner in UAE culture. On the other hand, it is acceptable habt in South Korea because it is healthy and also it is the way to show satisfaction for their meals.
2) Kissing in public. Kissing between man and women and in public is very rude in my culture because it is against Isalam and it is very personal thing should be happen in their personal home. In Europe, kissing in public is very normal thing in their culture and it could be part from their culture.
3) Spitting on the sidewalk. It is very rude in my culture because we all care about the cleanliness to our country and being clean is a part of my culture. However, spitting on the sidewalk in other culture like India is normal habit and these people do not care about the cleanliness of their culture.