Q. Why do western toilets have 2 lids?

Answer

There is an exception made for toilets that are equipped with a dispenser for the toilet seat cover automatically. Because the majority of public authorities comply with the regulation, the toilet seats in many public restrooms are exposed in the front (also called "split seats"). This seat was designed with the intention of preventing genitalia from coming into touch with the seat itself. They are intended to be used when seated. The hinged seat is the part of the toilet that sits on while really using it (in the case of a woman) ... The lid stops debris from falling into the toilet and spray from filling the air when the flush the toilet by preventing objects from falling into the toilet.