One thing that I always found interesting was the mythical notion about the power of a woman's vagina over men. This of course is a falsehood and women should be made very aware that your vagina does not possess special powers nor will it make someone stay with you.
The clear difference when men become attached to the vagina is more so the emotional attachment they have to you than the physical. Sex is sex in many instances and that is why someone can sex you and lose interest. There was not emotional bonding, nor the interest beyond your physical presence, and quite frankly, if all you offer is the physical, once that is obtained, why should someone stick around. The mission has been accomplished.
Here are some reasons why despite you thinking you have a super vagina, men may still not be into you anymore..
To start off, he probably was not into you as a person because he sexed you without knowing you, then as he started to learn who you were, he realized you didn't offer whom he wanted to build a foundation with.
The second reason is bluntly put that he just wanted sex and you obliged. Period. This is often when he probably found someone of more interest or was not looking for something out the bedroom and you hinted for more.
Maybe he isn't into you anymore because you nag too much. Cardinal sin: Nagging. One of the biggest turn offs is nagging and it doesn't get mentioned enough. Men tend to look at this as a female trait and although that is not necessarily true, this is usually what happens before he finds himself trying to hear sensible female voices elsewhere. The nagging is annoying and will lead him elsewhere.
Stop forcing him to so many functions he is not interested in. There should be a balance and a limit to how much he has to endure or you have to endure as well. If he doesn't go to Church, introduce him to it but forcing him will not get him a pass to Heaven. Find meaningful conversation about your beliefs that will show him the importance and have him open-minded about exploring a spiritual life or religious life. Don't try to force religion on anyone as this has been known to backfire and push him away.
If you take long to shop, just say it and stop dragging him along and forcing him to feel like a third wheel even when it is only you both. Make the shopping trip an experience for you both, not just about your bags and shoes. This is something that can push a guy away.
If your family/friends gives him a hard time and doesn't like him, do not force them on him. Sometimes gradual moves are best and space works most. This discomfort can make him explore other options.
Another reason he may not be into you anymore is that he realized you aren't pulling your weight. Sometimes you are more expensive than you are proven and he feels like he is the only one shelling out cash. Had this been 100 years ago, that would be great but in this day and age, men expect an independent working woman who brings more to the plate than her vagina and being there are so many that bring much more to the plate, he has options.
One more reason he isn't into you anymore despite you having a vagina is that possibly, in your efforts to impress him, you were not being fully yourself and the real you began to surface and the real you is not what he is attracted to. Now being yourself does not mean to give too much information too soon because that too can be too much for him. He doesn't need to know how many partners you had or stories about your ex on the first couple dates, if at all. Sometimes he wants to know important events from the past but most interested in who you are today. Let time open ways to introduce bigger past moments. To save this event from ever happening, be yourself from day one. This is always best.
Ladies, you are amazing and there is someone out there for you. Men need to work on themselves as well as you need to work on yourselves. Think about these suggestions. It will not hurt.