Ukilandian etiquette

Ukiland is a country that has its own etiquette, which was shaped for years, from the part when Ukiland was just a couple of tribes, to the modern era.
 * After a goodbye, the guest must leave without starting any more conversations
 * It is rude to have your back turned to people
 * It is rude to remain standing up in a house, except if there aren't any more places to sit in the whole house
 * After you meet somebody, you MUST shake hands, or you'll end up leaving a bad note
 * Music is only listened when alone or in a club, except for some regular-sounding songs
 * For women. exposed navels are considered lewd, and women go to beach in swimsuits only