We've all heard of "man code" including such things listed on askmen.com.
But is there "woman code"? there should be!
K I did find one online here and on a couple facebook pages.

I think we really need one and #1 on the list is you don't try to steal another woman's man.
If you know a man you are interested in has a girlfriend then back the eff down. It's just really sleazy if you are throwing yourself at someone who has made it clear they already have a girlfriend. It is okay to wait and see how things go with said girlfriend and be available once they do breakup but don't try to get him to break up with his girlfriend for you. (that is if you do not know the girlfriend. If you do know the girlfriend, move on and find a new man to chase)