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In the public toilet, we always find that the toilet seat is very dirty.
Because,There is always a person who does not lift the toilet seat.
When next one want to use the toilet to crap,
they have to clean the toilet seat first.
But if we can let the toilet seat adhesions the toilet lid when we use it for pee,
The seat will not be contaminated with urine.
Tianjin University Renai College