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Safe kiss? Healthy kiss? This is a toothbrush with two heads which respectively represent man and woman. Nowadays it is common for lovers to use one toothbrush together. However this habit could cause problem like infection of oral diseases when one of the lovers has sickness like gingivitis or paradentosis. People having such oral diseases are really likely to bleed when brushing their teeth so that the toothbrush would be stained with blood and spittle. If the lover uses toothbrush without thoroughly cleaning it up, he or she would be infected by the same disease. At the same time preventing this problem from happending, this toothbrush als
East China Normal University
Shanghai, China
East China Normal University
Shanghai, China