Thems42,
There is no gland in the human body (male or female) that can manufacture that much fluid on demand in such a short time. No blood, semen, saliva, arousal fluid, menstruation or urine.
So where does it come from? If it builds up in the ‘female prostrate’ glands you will look like a giraffe that swallowed a beach ball because there would be two cups of fluid (or up to a liter) jammed into that small area between your vagina and your pubic bone. At 30 ml the volume of the fluid will be 9 times the volume of the area it is claimed to come from. At a liter it will have to swell up 300 times its own size. A cup will make it swell up 70 times its own size.
It is like saying that if you rub your ring finger for a few minutes, it will build up a liter of fluid (or two cups of fluid) in your finger and squirt it out all at once if it have a valve. I think that you can appreciate that this is not possible.
The other option is that it will not be building up but be manufactured on the spot, so about 4 ml every 0.8 seconds. Once again, no known gland in the body can manufacture fluid at that rate.
The only place where that much fluid can be stored is in the bladder which has the space and ability to expand...
The tissue that makes up this are around the urethra is the same tissue that forms the male prostate gland. I am yet to see a man that can ejaculate 1 or 2 cups or a liter!
In the studies done a catheter was placed into the woman's bladder. What is considered female ejaculate leaked from around the tube and contained PSA (prostrate marker) and urine came out in greater quantities from the tube stuck into the bladder when she was sexually stimulated.
The latest British studies showed that this "prostatic" fluid can be produced by stimulating the clitoris or the g-spot and it happens independent of an orgasm. It is however still only a few drops of fluid to a little less than a teaspoon full.
From other studies it has also been shown that female urine after sex contains PSA supporting the theory that the actual female prostatic fluid pushes up into the bladder from where it gets released in these large quantities. These amounts of cross contamination between PSA and urine are too much to be explained by "left over".
There is nothing wrong with female ejaculation; no matter where it comes from and how much it is and what fluids are mixed in with it. As you indicated, it is extremely pleasurable and a lot of fun. There is no reason why a woman should be ashamed of anything coming from her body. Men normally enjoy this even more than their partners and a man that is repulsed by it is not worth it to keep around.