And those norms are mainly the result of good advertising。

而这些社会规范主要是广告宣传的好的结果。

After the Civil War, both advertising and “toilet soap” (i.e., soap for the body) became more prevalent in the United States, says Katherine Ashenburg, author of The Dirt on Clean: An Unsanitized History. “Americans turned out to be much more gullible and susceptible to these things than Europeans,” Ashenburg tells BuzzFeed Life。

《清洁污垢：一个不卫生的历史》的作家卡瑟琳·阿西伯格说，南北战争之后广告和香皂(即为洗身体的肥皂)在美国变得更流行。阿西伯格告诉BuzzFeed生活栏目“结果是，美国人远比欧洲人容易上当，容易受影响。”

Germ theory didn’t matter half as much as promises of beauty,” Ashenburg says。

阿西伯格说，“对美丽的承诺远比病菌理论重要的多。”

But here’s the thing: Frequent showering may actually be doing more harm than good。

但是事实上：频繁洗澡弊大于利。

Zeichner and Hirsch say that showering too often (particularly in hot water) can dry out and irritate skin, wash away the good bacteria that naturally exists on your skin, and introduce small cracks that put you at a higher risk of infection。

蔡克纳和赫希说，洗澡太频繁(特别是洗热水澡)会导致皮肤干燥和过敏；清洗掉皮肤本身就有的有益细菌；产生表皮裂纹，让你更容易受到感染。

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