”Wash your hands before and after meals” is taught to children by their teachers in kindergartens, well learned and observed by urban children, and has been adopted by educated adults. This habit has never been questioned, and no one seems to have modified it, but in the details of hand washing there is a “norm” – a few steps to wash the hands, also posted to the hospital, but also become a medical staff must follow the principle of sterility. I found this good habit is not comprehensive enough after doing surgeon, personal opinion, for reference, after dinner laugh can also be! Hand washing before meals is not controversial! There is no controversy about washing hands after peeing! Just think “before the stool” hand washing should be attached importance! Why? Because, what did the “hands” do before the stool? What have you touched? You don’t remember, or you don’t care, and you don’t know how dirty it is, so it’s not good for you to use such “hands” to “poop”. Whether it’s urination or defecation, you can’t help but need your hands to help, especially for male citizens, and dirty hands touching your own perineum or genitals may lead to undesirable consequences. Therefore, I think the slogan of hand washing should be “wash your hands before meals, before and after pooping”, although it may cost more water, as long as you pay attention to saving, it should be possible to practice. As for not washing your hands after urination, as long as you wash your hands before urination and the process of urination is “good”, it is better not to wash after urination! After defecation, it is best to wash your hands because you want to clean them. I think this is in no way a cleanliness point of view, but just the application of the principle of surgical sterility to real life. Think about it! Try! Change!