My 2...1st, I am not married, so I cannot speak on how married people do. But I think that 38 years of knowledge and wisdom can say this: You knew who your woman was BEFORE you married her. If you see a change and you do not think it is positive and you think it is because of the fact you got married, then you are most likely right.
But here is something else that you need to look at: The fact that you did not "KNOW" her before you got married. Anybody that says that they did not know their spouse was like that until after they got married is speaking plain and unadultarated BULLSHIT. The signs are there. You have a choice to see it or not.
Example:
Wife usta swallow before you got married. Now you can't get a handjob. Trust, you knew this was she doing this just to get a ring. If you did not, you were so caught up in getting your balls licked, that you took comfort in thinking that would be forever. She SHOWED you who see was from the jump. Trust, you made the choice not to see it.
Same with women. If they say that they did not know that their man would cheat, is a ding-bat. He was a selfish fucker from the start, but being caught up, you made the choice to ignore the signs.
Take a moment of pause and look at who you are spending quality time with. Question everything that you do not understand. Do not argue, but question. Trust me, that is your best defense.
I do not think that there is a unwritten law, to stop doing certain things once you get married.
I hope I answered your question.
INVICTUS3RD