Toilet Flachspüler different from normal toilet because when you do the bowel, biological waste you do not fall directly into the water like regular toilet seat. There is a "platform" dry flat in your usually de-poo. What causes this toilet is widely used in Germany? The answer is because the Germans have a practice of examining their faeces after defecation. From tailings produced they can find out whether the digestive system and their diet is at a healthy level.
German society diet of beef and pork are high. If the meat is not cooked properly it can lead to worm disease. So now you know. Toilets are also preferred by Germans because of the fecal water from splashing into the toilet bowl is unlikely to happen. It is also preferred by women because it is impossible for men to urinate standing when using Flachspüler. Flat platform surface will produce a definite spark their wet pee standing up. Genius!
This is actually not something strange in China as well. In ancient times, the Emperor of China tailings will be observed every day for his health gauge. Problem of worms in the stomach can be known directly.
