I think Minjun is right. Guns are loud and the city is probably quiet except for the dead. You will just be ringing a dinner bell. Unless he plans to use it to clear an area from an unreachable vantage point.
Female skinship in Japanese culture has never made sense to me. Like what if you swap the genders and one dude is behind another dude jerking him or feeling up his chest. You know? Just weird.