It actually has nothing to do with orgasm denial, in fact its quite the opposite, a woman is more likely to achieve ejaculation after 2-3 orgasms than she is through other means; which btw vaginal orgasms (g spot) and female ejaculation is not directly related the way one may think it is.
Grafenberg's reaserch has been added to by many others now, such as Robinson, Pietranton, Perry, Belzar, Whipple and others.
In fact its become quite common knowledge for those that keep up with such things that all women have a "g spot" that if properly stimulated will result in orgasm.
According to Whipple there are two reasons the "spot" was overlooked by so many physicians:
A) it's on the anterior wall of the vagina in a region not normally palpated.
B) It must be palpated in a specific fashion to illicet the appropriate responce, most doctors (and sexual partners) dont do "that" lol. Just rubbing against it often times isnt enough.
In fact according to Whipple and others all the doctors who have looked for it using the correct anatomical directions found it in every woman they examined.
Just becuase one has a G spot doesnt mean one ejaculates however.
Reaserch has shown that only between 10% and 40% are capable of ejaculation.
And G-spot stimulation isnt allways nessesary for ejaculation to occur.
It has also been determined to not come from the Bartholin gland but does have somthing to do with the number, size and distribution of pariurethral glands.
Also about 20% of women who ejaculate do so through the urethra rather than the vaginal opening, and not all of them squirt persay, some just excrete copious amounts of fluid. I am in the later group myself. Blushes.
The link between ejaculation and g spot orgasms seems to be deep uterine contractions brought on by extreme sexual stimulation, which is simply more likely with g spot orgasms as opposed to clitoral ones alone and also twice as likely to occur after several orgasms have allready been achieved.
Chemical composition of female ejaculate is not pee and has nothing to do with poor bladder control whatsoever.
Most reserches say that women in the study groups reported the first few seconds of impending orgasm stimulation, and in paticular g-spot manipulation, produced a strong feeling that one is about to pee before changing to a sexual responce.
Naturally most of us will pull back when faced with this sensation and hold back thinking we are about to pee when this area recieves the proper stimulation which some reaserchers think is why a quarter of all women have never had an orgasm at all let alone a g-spot one.
Having a well-toned PC muscle also makes one more likely to ejaculate, not to mention improves orgasms in general.
So break out the ben wa balls and start working out if you want to really have some fun trying to see if you can do it too ladies.