1, Tooth strength test: Please bite your boyfriend's or husband's arm with your teeth, and gradually apply more force. When your boyfriend or husband shouts, quickly measure the decibels of his shout with a noise measuring device. If the measured value is higher than 100 decibels, it means your tooth strength is 100; if the measured value is between 50 to 80, it means your tooth strength is 50; if the measured value is 0, please take your boyfriend or husband to the hospital to check his pain sensing nerves.