When we enter the mysterious Iran and follow the elegant black robes to the ancient villages inhabited by Persians, we seem to be lost in a city-state full of exotic customs.
In front of the ancient house of Tabatabayi, the guide Qiqi introduced to us that the doors of wealthy people in Iran are very small, so as not to reveal their wealth. Gigi and I grabbed the time to take pictures of each other. Qiqi saw that we were both taking pictures on the side of the long door ring (no wonder, the door was open like this). She smiled and told us that there were two door rings on the door of Iran's old house. The shape of one left and one right was different (you know), and the sound was different, so that the people in the room could tell whether the knocker was a man or a woman. Man, and then decide who will open the door.
Later, I visited some ancient villages, many of which were equipped with such door rings. Alas, the world is so big and there are so many customs. We really need to ask, see and understand more, otherwise we will make jokes.
Every time you prepare to go to a place, you will first check the local customs, customs and habits, lest you offend the aborigines and destroy the local customs. That's not fun. In case you stay as your son-in-law in the name of folk customs, right?