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

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

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

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

Polite: The rule is to leave at least one arm space between people to respect personal space: The United States, Costa Rica, Ethiopia

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

Polite: Arriving late to a party is not merely polite, it’s an act of graciousness to avoid the risk of interrupting your host doing last-minute preparations: Costa Rica, Argentina, Italy

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

Polite: You should always start a conversation by saying greeting hello: Argentina, Egypt, France