I was the only person in the men’s restroom last week when another man walked in and stood at the urinal right next to mine.

There were seven empty urinals and four empty stalls, but he decided to stand right next to me. And this wasn’t just any urinal; it was the baby one that only people under the age of 10 or the vertically challenged would have any business using. This man was taller than me.

This guy was in direct violation of the code. There are no legal laws or rules regarding bathroom urinal usage, but there are many unwritten regulations that men should learn to abide by in certain situations.

The Guy Code or Man Code, whichever name you want to call it, is usually understood by all men, but in some circumstances, like the one above, men fail to understand their duties as men.

The urinal code is one of the most known codes, but there are several others men should know and live by.

For anyone who enjoyed the movie “Old School,” Craig Kilborn teaches men that they shouldn’t tell on another man who is cheating on his girlfriend. A true friend should try to intervene one time, but if he persists, you never saw or heard anything.

Do any of your friends have an attractive sister? Well, too bad. Any man should know that a friend’s sister is off limits. Moms and ex-girlfriends are also off limits, but cousins are up for grabs.

When in a fight, it is against the code to kick, knee or hit another man in the testicles. If you can’t win a fight the right way, then you probably shouldn’t be fighting in the first place.

A man should understand that if he doesn’t call “seat back,” “fives” or “squatters” (I’m sure there are more names for it) he will lose his seat after leaving it. This code may come under review if the man leaving his seat is getting a round of beers for the other men in the room.

If there are more than two men in a car and the man sitting shotgun doesn’t change to another radio station after three seconds of a Britney Spears song, he loses shotgun privileges forever.

I don’t care what your girlfriend or the salesperson at Abercrombie & Fitch says, pink shirts are not cool.

Under no circumstances should a man order a Zima or a drink that comes with an umbrella in it.

A simple nod can equal a five-minute conversation in the code. A high five or a pound lets your buddies know they are appreciated without having to tell them your inner feelings, which would make both you and them uncomfortable.

When entering a room with a group of men who are watching a sporting event, it is fine to ask what the score is but not who is playing. Also, figure skating and gymnastics are not made for viewing purposes.

Remembering a man’s birthday is optional, but buying him a card and having the other guys sign it is forbidden.

This is just the beginning of the long list of items on the code. Men should do their best to fulfill their duties or be shunned by other men for not doing so.

Shunned men can only be accepted back into the group by doing something manly: Letting out a loud burp or doing the longest keg stand would be acceptable.