As we all know, the United States is an advanced country, this can be reflected in many places, and the toilet in the United States is a typical example. The reason why the U-shaped toilet seat is used is largely because of the structure of the human body, it can prevent our private parts from directly contacting the toilet seat, which will be safer and avoid infection when using public toilets in the United States. That is why the design of the toilet seat is difficult to have a gap in front of the U-shape.
Their sense of safety is very good, just a “U-shaped” seat is not enough, they also put a pad on the toilet, people will change the pad after use. As we all know, the space of the toilet is limited, the person sitting on it fits tightly to the surface, the air will not circulate when the waste is discharged, the gap design can avoid this situation.
The culture and ideology of each country is different, the toilets used in those countries do not have a U-shaped gap, because Asians are relatively slim and small compared to Americans and Europeans, and so will not feel it is too problematic during the process of using the toilet.