"Throw something in the USA to someone, may not be disrespectful, but in other parts of the world, yes, putting your arms in a proper position while you eat." Actually in Perú, When you give to another person something by throwing, the other person needs to be at your same level. In the years of my childhood, if you throw something to your parents when they asked you for something, you must be someone willing to die.
"People stare anyone whether is a woman or not."
Sometimes I look around and I suddenly end up staring at someone, If it happens, I always say hello. The other person gets reactions. They are not rude, most of the time funny. I guess is ok in Perú, I mean, you don't mean any harassment, it is incidental.
"In some places in the USA is not offensive to yawn and but in some other parts, you have to cover your face" "Stretching in public places". I used to sit and behave like this while in my hometown, for me it was ok. it is like saying, Okey. Anyway, When I came to the "civilization" I was taught it was rude, especially if you are a teacher, a person in a tie, Then to do something to be nice to others and to put it into perspective, it turns to be an act of service then, trying to meet the standards of others while you are with them in respect.
"Walking with your hands in the pocket". It is considered sloppy my grandmother used to say, Stop playing with them, they have a purpose, I did not understand at the beginning, years later I finally got it. that was when I paid attention to my students, Then I understood.
In Japan is rude to blow your nose in front of others, so is in Perú, but people with no education or social status care about it.
"In China, Taiwan, and much of the Far East, belching is considered a compliment to the chef and a sign that you have eaten well and enjoyed your meal" In Perú if Dad does it, it is funny. If you do it in Public, it is rude.
Nowadays, a bone-crushing handshake is seen as admirable in the United States and U.K., but in much of the East, particularly the Philippines, it is seen as a sign of aggression -- just as if you gave any other part of a person's body a hard squeeze! In Perú, it does not feel right when you greet someone and That person gives you the left hand is not good.
"When dining in China, never force yourself to clear your plate out of politeness -- it would be very bad manners for your host not to keep refilling it. Instead, you should leave some food on your plate at each course as an acknowledgment of your host's generosity.
Manners that may be good in the United States may not be in other parts of the world. See the rest of our list to learn more." In Perú is not polite to leave food on the plate. You are offered a second round of whatever you are eating, It is ok, to say no. Some people may expect you eat a lot, They have probably prepared a lot thinking you eat that much. It is actually important to take those aspects into consideration while preparing a lesson or trying to teach something since those habits and behavior standards actually help to know the kind of approach suitable for the students.