At the risk of becoming rapidly unpopular with the women who have posted in this thread, I will say the following:
1) I believe men and women are physiologically capable of orgasming from a finite number of types and combinations of types of stimulation, which, if explored properly, under the right conditions (mental, emotional and physical), will lead to orgasm.
2) If a given woman has one specific "way" she likes to orgasm, I think she has shut a lot of doors for herself and is missing out on a whole hell of a lot of experiential opportunities.
3) That isn't to say a woman can't have a favourite way of orgasming. But I personally think the day we stop trying new things is a very sad day indeed. The tried and true can be mixed in with some experimentation without losing anything, and with a very high potential to gain something. Accordingly, just because something hasn't worked once doesn't mean it won't work if tried again.
4) Trying again doesn't mean just "harder" or "faster." Come on. That's as insulting as what the guys are being accused of saying. Trying again means bringing together a number of conditions, not the least of which is powerful arousal, which is often the factor that is absent when sex isn't working all that well for a woman (or a man, for that matter).
5) Nobody in this thread has suggested that any woman is under any obligation to try any kind of sex to produce any kind of result if she doesn't want to. All that has been stated is that certain kinds of stimulation to a certain region of the vagina can lead to powerful, intensely pleasurable orgasms for many women.
6) I don't think those women should be made afraid to post here because of a fear of taking sides. I'm taking the side of being reasonable and truthful, and recounting my own experience and view of things. I orgasm powerfully from fornical stimulation. Even more so if it is rhythmical in a certain way. There is nothing wrong with me. And if you haven't orgasmed this way in your experience as of yet, there's nothing wrong with you. There's nothing wrong with you if you never orgasm this way. But please don't throw the baby out with the bathwater as so many people do when it comes to sexual experimentation. If you try something that comes highly recommended, it probably comes highly recommended for a reason. If it doesn't work for you, don't throw the idea away; instead, file it away for future reference. You may be very glad you did.
7) This is a big cock site. I am here because I like big cocks and I like getting fucked by big cocks. IMO a big cock is capable of delivering more of the kind of penetration I need (including deep fornix penetration) than an average cock, and that's just all there is to it. If a man has this kind of equipment, he should not be derided for being proud of what it can do. I understand some people are nauseatingly arrogant about this. But IMO they are in the minority, and we shouldn't punish the many for the "sins" of the few. Big cocks are good for stimulating fornixes. It's a fact of life. Deal with it.
Now that I've (probably) thoroughly pissed some people off, I think my work is done here. I have no intention of wasting time getting into lengthy arguments with people about what women are and are not capable of experiencing. I am a woman, and in my experience, it is very wise to "never say never."