The hat-off ceremony came from the era of cold weapons. At that time, helmets were worn in combat, and helmets were mostly made of iron, which was very heavy. When the warrior arrives in a safe zone, the helmet is first removed to ease the heavy burden. This way of taking off the hat means that there is no hostility, such as going to a friend's house, to show friendship, and also to take off the helmet. This habit is passed down, which is today's hat-off ceremony.
Today, the undressing ceremony has been very rare in the United States, partly because social etiquette is less strict, and partly because people don't wear hats. However, in the 1950s, it was common for men to take off their hats for women. Whether they were indoors or taking an elevator, men had to take off their hats. (In 1949, the earliest known etiquette for elevator etiquette said: Countless women complain that men always hit their heads when they are saluting in the crowd, so men don't take off their hats.) But in the 18th century, people It is impolite to wear a cap indoors. When a man greets a lady, he should take off his hat and then wear it back. The reason for this is too simple. First, in most of the history, the hat is the mark of the class and the visible sign of social status. The tradition of wearing caps dates back to ancient Rome. At that time, the cover on the head was a sign of social or political superiority. Secondly, if the hat is caught in the hand, it is inconvenient to pull the sword. Just as the change on the head marks a certain sense of superiority, then no cover is a sign of obedience. Since the early days of the Middle Ages, the capping—whether the hat is made of cloth or metal—has been obeyed。