Many married women already do it for money... in a way.
A girlfriend who hates giving oral says she will in exchange for jewelry. (I'm not sure if she's joking or not)
Re: prostitution... I don't inherently have any issue with it. I think it's like any other service like a legit massage, getting your hair cut, or car detailed. Exchange of money for services. HOWEVER, there is a huge gender bias in both the laws and attitudes around it that is discriminatory against women. For example, laws in Nevada required sex workers to submit to a cervical exam... how can a man be a sex worker when he doesn't have a cervix to examine? (This law was in effect from the 1970s through like 2010... 40 years!) And let's face it, the general attitude is that a prostitute (who is almost always thought of as a female) is a whore and her client "has needs". I don't think this bias will change in any of our lifetimes.
Married women?? That's actually a very deep thought!
But, with marriage comes commitment, and faithfulness, and love and most importantly mutual respect. And it's a kind of a quid pro quo, where both parties give and take! Yes, men get sexual pleasure, but so do women, don't they?!! this is what i think about marriage.
As for a GF that would give a certain act, a blow or whatever in exchange for "anything materialistic", if it really happens, this is a very slutty act! she might think she is being smart, but sorry, I would certainly disrespect and despise her for that!
Are you considering prostitution simply as "exchange of money for services"! this is your own body (I might have used "pussy" iso body, but just out of respect i didn't!) we are talking about! Women's body is something "precious" and very "special"; treating it as a "tool" that can be used to perform a "service"?! Although I am a man, but sorry, I cannot look at women with such a disrespect! Your body is so valuable, and should be dealt with as "priceless", that only a TRUE man that will treat you with full respect should be allowed even to "touch" it, and you can even further read about what a religion like Islam dictates that no man is even allowed to "SEE" any part of your body except your husband!! (Christianity and Judaism also have lots of teachings about modesty that roots to the same ideology of respecting women's bodies!)
As for the gender bias, i totally agree. Since i mentioned religions, almost ALL religions consider both parties guilty of "adultery" when participating in an unlawful act of sex! I don't know why so many laws in so many countries differentiate between men and women! except that maybe truly we are living in a "patriarchal" societies controlled by male chauvinists! If you would consider prostitutes as whores, you should definitely consider men paying them as molesters!! and pimps running their businesses as pure criminals!!
thanks for sharing your thoughts, very thought provoking!