My ex-husband and I were married for fourteen years and together for seventeen. Our sexual relationship got off to a very strong start, but we did go through a number of "dry spells" over the years. We also had a number of times when the dry spell would end and we would start having sex again.
The number one reason I didn't want to have sex with my ex (during the dry spells) was that I was either flaming pissed off at him or slowly sizzling with resentment against him for something. It had nothing to do with my sexuality or level of sex drive. It had everything to do with our outside-the-bedroom relationship and how we were getting along.
I don't think it's all that illogical that if a woman is displeased by a man, even on a very subtle level, let alone a more conscious level, she won't be raging with lust for him.
When my ex would complain that he wasn't getting any, I would secretly think to myself, "It's not that I don't want to have sex -- it's that I don't want to have sex with you." I didn't say this out loud, though, because it sounds so offensive.
Issues in relationships can be very complicated and are usually not as simple as one partner saying "I'm doing x, y, and z to try to keep the spark alive."
That may be true, but there may be other things you are doing (or not doing) that (justly or unjustly) your GF is disappointed with. Depending on her communication style, she might have told you straight out or she might have tried to tell you in more subtle ways. But it's quite possible that she may have only told you once or a few times, and when she didn't feel you listened, she stopped asking and just stayed dissatisfied with the situation, thinking any further discussion was pointless.
It was this kind of hopeless, frustrated, "the problems are too complicated to be worked out and he'll never understand me but I'm too attached to him to leave" feeling that usually caused me to stop wanting to be intimate with my ex.
I'm not saying this is the issue in every marriage where the woman stops wanting to have sex. But I'll bet in the majority it is exactly the issue. She is disappointed in you ergo she doesn't feel close to you or doesn't feel her feelings are safe with you ergo she doesn't want to do anything as intimate as have sex.
Fortunately, my ex and I would come to places where we would grow as individuals, have breakthroughs in our relationship, become more understanding of each other, etc. and then our sex life would pick up again.
But I want to stress that in the very early days of our relationship when I had constant crazy sex with him, it was not fake and I was not just doing it to ensnare him or to get money (he didn't have any anyway). I was doing it because I wanted to and because it was extremely fun.
I really resent the implication that women only have sex early on to try to tie the man down or get something from him. And I really believe that in the majority of relationships where a previously very sexual woman has seemingly lost interest in sex, it is a relationship issue, and not a sexual issue per se. And, if the relationship issues are resolved, the sexual issues will most likely resolve automatically.
One friend of mine really did think she had completely lost her sex drive. She also happened to be extremely frustrated with her husband who did not work but also would not take care of the kids and house.
Then, she ran into an old flame, and was shocked to discover that her massive libido was still there; it had just gone dormant because of her disappointment in her husband.
I am not saying it is always all the man's fault that the woman is disappointed. Sometimes she may have unreasonable expectations or a skewed perception of what is going on. In these cases, the only solution really is to bring back open communication (if it was ever there) to the relationship and/or get counseling to try to fix the relationship problems.
This is impressively explained and right on the mark. Well done.
That said, I've seen it a million times: the guy wants to keep having sex, and the woman just isnt' interested. It's certainly complicated, and undoubtedly, men's drive is different ( stronger) than women's on average. It just pisses me off when women lose it. That's what makes me want to have sex with guys because they almost ALWAYS want it, and it's the lust/desire that makes it really hot.