In Chile, it is considered very rude to eat anything with the hands, even foods that people tend to think of as made to eat with the hands, including french fries, according to CNN. There are many countries and regions in the world, including the United States, Canada, parts of South America and much of Europe, where it is generally considered rude to eat with one's hands, though this may depend on context. For example, eating a cheeseburger with a knife and fork would seem unusual in the United States, and in this case, it is more socially accepted to eat with one's hands than to use utensils.
In many parts of the world, eating with the hands is the norm and utensils such as forks and spoons are rarely used. However, in some other cultures, utensils are used for specific purposes in dining other than bringing food to the mouth. One example of this is that it is considered rude to put a fork to one's mouth in some parts of Thailand; in these places, forks are provided to help guide rice onto the diner's spoon. In other parts of Thailand, certain dishes are made to be eaten with the hands, and using utensils may be considered rude. Eating tacos with utensils can be considered rude, or at least overly fussy, in Mexico.