How do a man knows if girls water broke?

It is not possible for a man to know if a girl's water has broken simply by being near her or observing her. Only a healthcare professional, such as a midwife or doctor, can determine if a woman's water has broken by conducting a physical examination, which involves checking for fluid discharge through the vagina. Therefore, a man cannot know definitively if a girl's water has broken without consultation or examination by a healthcare professional.