It is bad to burp on someones food.
Frank is eating with family and just finished a delicious supper made by his wife.
Frank wants to express his appreciation for the meal.
Frank tells his wife thanks for the delicious meal.
Frank lets out a loud belch, spraying people's food with mucus, and says that's how people in foreign countries say thank you.
Frank's wife appreciates the compliment and everyone finishes their food.
Frank's family is disgusted and refuse to finish their food.