Good and evil

I'm worried over how so many marriages fail, because I'm convinced that I want to be with the same person all my life, so I did some research.
I came across one article that said that to conduct a successful marriage, as a woman, one must find an honorable man, and it then went on to explain how dishonorable men toy with your emotions and your body and how, if you come across such a man, you should leave him before you get in too deep.
My first thought was that considering how I've toyed with boys, the article defines me as a dishonorable woman.
So I'd like to just step in and defend the guys labeled as dishonorable. To do so I'm going to start by throwing a theory out there: Under certain circumstances, and provided the opportunity, all guys are jerks. Don't believe me? Well, then if you're a guy you're in denial, and if you're a girl then congratulations, you're honorable enough for guys to treat you right. The thing is that, if you treat a man right, he will, if he's ready for it, treat you right as well. If he's not ready then you can't force him, just back off and hope someone else will be right for him. This works the other way around as well of course, there are women who play around until they find an honorable man at the right time of their lives.
My point is that people are not honorable or dishonorable. It's all to do with circumstances, influences and timing. In my opinion, it's wrong to label people like that.