I have heard this expression, but I don't know if it is more accurate. It is internationally recognized that French perfume is the best. That's because many, many years ago, French aristocrats thought bathing was bad for their health. Some nobles even take a bath at birth and death, but because of the long-term smell, their ancestors invented perfume, and no country in France can surpass it so far. Many foreigners have a sense of smell, and they use perfume to cover up their smell. 3. It's an international etiquette, and it's also spread from abroad. Many people think that wearing perfume is a kind of respect for others.