Also, being that the Code is a male creation, it is very simple.
There are only three rules, but they are to be adhered to most stringently, and any violation of the Code is considered a grievous infraction, usually punishable by a savage beating.
Because "Guy Code" is a creation entirely of the male subconscious, and is therefore universally known by all men, it is generally understood, but not spoken.
Interfering with another man's relationship goes against every impulse in a man's body.
This also helps to explain why Rule #1 is in effect; telling on your friend is the same as hitting on his girl.
It doesn't matter if you or your friends violate the rules of the Guy Code, so long as they take this rule to heart. Be vigilant, though; keep your friends from violating the rules with your girl; and keep in mind, if they do screw up, you can always beat their ass then buy them a beer.
This rule means that all violations of the Guy Code will be forgiven due to the innate and inescapable fact that you and your friends are all men.