It is my belief that Chofetz Chaim girls value the mitzvah of shmiras halashon, guarding the palate, from evils, such as mouldy bread and expired gefilte fish. Likewise, surely Chofetz Chaim boys are particularly stringent in this mitzvah, and seek out girls who, as housewives, will be scrupulous in this mitzvah when serving them their dinner when they come home from a long day at kollel.