I found this on the Internet and found it eerily similar to how a martial artist should conduct himself. It doesn't matter if you are a man or a woman when it comes to decorum or etiquette. A true warrior surpasses all others in how they conduct themselves. Source: http://www.thegentlemansjournal.com/20-things-gentleman-never-do/
What you don’t do is as important as what you do, do. As your loyal provider of all things gentlemanly, we felt it our moral duty to impart some of our wisdom of what we believe a gentleman should never do…
1. WEAR SOMETHING ‘IRONICALLY’
Geek glasses, Hawaiian shirts, 80′s retro sportswear, you name it – a gentleman wouldn’t be seen dead in something purely for the sake of ‘irony’, leave this look to the likes of pop-up-store-come-vintage-clothing-come-speakeasy-bar-owners.
2. PIERCE ANY BODY PART
Do what you like in your teenage, ungentlemanly years, but beyond these rebellious times and into the years of being a gentleman, remove all trace of past rebellions and never, we repeat never, pierce a body part.
3. SIT WHILE A LESS ABLE PERSON STANDS
This is more common manners than anything else, but a gentleman would never sit (on a tube or otherwise) whilst a woman, less-able or elderly person stands.
4. BREAK THEIR WORD
A boy speaks, a gentleman acts on his word and stays true to it.
A real gentleman stays loyal, faithful and honest at all times.
6. SPEND MORE TIME IN FRONT OF THE MIRROR THAN THEIR OTHER HALF
Vanity is deeply ungentlemanly.
7. FORGET WHERE HE CAME FROM
No matter how much a gentleman earns, or how much success he has garnered, a real gentleman will stay humble to his past.
8. KISS AND TELL
Because a gentleman never tells.
9. GET DRUNK AT A WEDDING (ESPECIALLY YOUR OWN)
Someone once told me that there is nothing tackier than a drunk bride, but in retrospect this applies as much to gentlemen as it does to brides to be. A gentleman knows his limits.
10. BE TOO PROUD TO APOLOGIZE
A true gentleman will apologize after a fight, even if he wasn’t in the wrong.
11. URINATE IN PUBLIC
Unless an 18 year-old having his first beer, there is simply no excuse.
12. DRIVE RECKLESSLY WITH A WOMAN OR CHILD IN THE CAR
You are not clever or rebellious, rather you are dangerous, and not in a the cool, rebel without a cause way.
13. GET A TATTOO BEYOND THE AGE OF 21
Similarly to number 2, it’s probably best to avoid this one too, if you did get drunk on a beach in Thailand and get your name in Arabic branded across your back, then consider keeping it covered up.
14. SIT CROSSED-LEGGED
Unless you’re doing Yoga – which is ok by the way – try and avoiding sitting like a child. There is just something strange about seeing a grown man sitting in such a way.
15. REFER TO YOURSELF IN THE THIRD PERSON
Annoying doesn’t even begin to cover this.
16. DRUNK TEXT/CALL
Not classy – just embarrassing. A gentleman does not need to be inebriated to communicate.
17. CANCEL AT THE LAST MINUTE
A real gentleman makes plans, and sticks to them, no matter what.
18. SWEAR IN PUBLIC
A gentleman would never let his mood dictate his manners.
19. BELIEVE IN LUCK OR CHANCE
A gentleman knows the power of cause and effect.
Your age does not refine your maturity.