To be considered as a good man,  you shall learn the traditional dance. It shows that you respect your heritage and carry the good traditional values. (May be the guys who dance during protests want to show people that they are leader worthy.)

Do not peak into the pot if you are not the one who is cooking. Literally they told me it is like slapping the person who is cooking in the face. Slap!

When you enter a house, you should take a seat immediately.  I am comfortable with waiting till I am invited to sit down, but it is considered rude.  Before you state your business, introduce yourself first.  “Hi my name is Jung and I am from…”