Impolite: It is best to refrain from opening a present on the spot as it is regarded as greedy or impolite: India, Philippines, China

Impolite: Making direct eye contact is considered aggressive and disrespectful: Poland, Korea, Philippines

Impolite: Don't ask "What do you do?" because there's a great social welfare system regardless of your job and they can consider you a classist: The United States, The United Kingdom, The Netherlands

Impolite: Using the left hand is traditionally considered unclean so it's inappropriate to greet, hold things or eat with it: Ireland, India, Portugal

Impolite: Blowing your nose is generally perceived as repulsive. Instead, it is advisable to politely excuse yourself as if you need to visit the restroom: Italy, France, Brazil

Impolite: The horn should only be used in emergencies; therefore, your unnecessary beeping might lead drivers to panic: New Zealand, Norway, Iceland

Impolite: Tipping is considered quite rude and the waiter/waitress will chase you to return it: Japan, Thailand, Philippines

Polite: Burping aloud is an easy way to convey to the entire table that you are now happy and well fed: Uruguay, Russia, China

Impolite: Leaving food on your indicates that your host may not have served enough food or a satisfying meal: Spain, France, China

Polite: Slurping noodles is not only acceptable, but is also a sign of appreciation: Romania, Turkey, Japan

Impolite: Don't talk with your hands on your pocket, it shows you're not interested in the conversation: Poland, Panama, Germany

Impolite: It's rude to look, smile or start small conversations with strangers unless it's necessary: Italy, Russia, Germany

Polite: Eating with your hands is not only acceptable, it’s customary: Ethiopia, Russia, Mexico