During World War II, Germany was the birthplace of militarism and the favorite place to grow this sanitary beard. Among these Germans, Hitler, the ruler at that time, was the main one. During World War II, Japan, as a fan of Germany and an admirer of militarism, imitated the Germans and wore a healthy beard. Even the Japanese at that time didn't know what the specific function of sanitation Hu was, but they still thought it was a respect for militarism.
Another reason is that during World War II, Germany, Japan and Italy often learned from each other, especially Japan, attracted by militarism, often sent people to Germany to study. When I went to Germany to study that day, I not only learned German militarism, but also learned some German feng shui habits, including sanitary Hu.
In the eyes of Germans, the existence of a hygienic beard is the most basic feature of men. Because Germans have a lot of hair, they all have beards. It is easier for them to clean their beards, and others regard them as sanitary beards. Nowadays, because of the change of people's aesthetic standards, few people think that sanitary beards look good.