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Learning the Mechanism of Urine from the Teacher Who's the JAV actress in this video? Amateur? Name revealed!

In a health class, the teacher attempts to seriously explain to students the human body's excretory functions. Standing beside the teacher's desk, she pulls down her underwear, turns her back to the students, and straddles the desk. In this position, facing her anus toward the class, she demonstrates the actual mechanism of excretion. Urine streams from her body with audible flow; some fails to fully run off, trickling down her thighs and dripping onto the floor. Witnessing this scene firsthand, the students gain a deeper understanding.