Looking for a joke of a medical student, it is said that a woman stabbed her boyfriend 17, and the knife avoided the key. Who knows this joke?

BF, a female student in medical department, shows her legs in front of girls every day with a new lover. The girls can't stand it. Finally, I quarreled with them in the canteen. They stabbed boys more than 20 times with knives, all of which avoided important organs. The boys suffered great trauma, but they were still judged as minor injuries. The brilliant deeds of this school sister have become a must-talk content in anatomy class every year, and it is euphemistically called: "Knowledge is power."