From an observer's point of view, I think a lot of guys just hand over their balls once they're in a committed relationship/married. I have one friend who has dated the same girl for about 6 years now, and she did her best to enslave him. He started off kind of a pussy, but over time manned up more than I ever expected. I'm so impressed. She was the stereotypical woman people are railing against here. On multiple occasions, he threatened to leave, and she turned on a dime back to the ideal girlfriend...for a time. As far as I know, she has improved by orders of magnitude since the beginning. Part of that is certainly just maturity, but so much of it is also him knowing that he needs to stand up to her shit now and then. For example, she used to get mad at him at him the 2-3 times a year when he'd go to the strip club when his buddies were in town, and now he basically tells her "I'm not doing anything wrong. I want to spend time with my friends, so quit bitching about it." A stark contrast is his married coworker who once made us lie an entire weekend to his wife that we were playing xbox all night.
The thing I worry about, however, is when they get married, will she flip a switch knowing that he can no longer go anywhere?
Women *in general* like to test their boundaries I think more than men. Or maybe it's the same, but they do it in different ways. If you're a woman and your man goes to a strip club a couple times, and you're ok with that, maybe he starts going more often and gets to going twice a week. Or maybe he goes out drinking too much with his friends, or gets a little too close to a female coworker. At some point there you needed to put your foot down and let him know it's not ok. In contrast, women tend to go too far with nagging and nitpicking. The same principle applies though: you have to compromise to a certain extent, but you also have to stand up for yourself if it goes to far. Men tend to want to avoid the confrontation, so they withdraw to get it to stop (this is a well-documented phenomenon called "demand-withdraw"). However sometimes it is important to have a major confrontation and stand up for yourself to improve things later down the line.
tl;dr Just because you're married doesn't mean you can hand over your balls.