Which bro code or girl code rule actually matters most and why?

What’s the one bro code or girl code rule you swear by — and why does it deserve legendary status?
Share any real-life moments where you’ve seen it in action (good, bad, or hilariously chaotic). Also, if you had the power to make one rule mandatory for your gender, which would it be — and what makes it essential?
Short, sharp answers welcome. Long stories appreciated. Let’s see which code truly runs the world.
Which bro code or girl code rule actually matters most and why?
Which bro code or girl code rule actually matters most and why?
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