a relationship is what you make it. I'm sorry you have not found the right woman to treat you this way over and over... I was married for 11 years and I promise you I treated my X with this type of treatment at least (least) 5 times a week.
So... in a nutshell you are saying men are pigs and eventually they will replace said other chick for new chick?
so gawd damn typical of a man to say.
honestly, if I am not tending to my man like he should be tended to and VISE VERSA, then he should tell me what I am doing wrong and VISE VERSA, and if either party refuses to fix the wrong and make it right then so beit, move on. The only thing I ever ask is that I am the first to know that I am slacking and he is moving on. I would prefer that over finding out second hand that i've been fucked around on. I'm a very reasonable person (believe it or not) and if such a situation arises I would expect the same as I promise to give.