g-spot

When I was 14 and not yet sexually active I found out one day my shower head felt very nice against my private areas, I began to experiment more and more with this until I learned putting it on full blast and massaging my vagina and allowing it to shoot up inside would cause an intense orgasm, my butt would even get really hot. Over about a year of doing this I realized the feelings were getting less intense, and very disappointing, I also noticed my vagina was less pink and sort of stretching. I Stopped at this point but I feel it was too late.

Has there ever been a study(I'm sure there has) on the percentage of woman who experience an orgasm in general, clit orgasm and /or G-Spot orgasms? I have a feeling it may be lower than most men think. With the divorce rate in the U.S over 50% now, I kinda think that if a husband can make his wife cum over and over and over again ever day that in some way would make a stronger marriage.

My girlfriend, always stops me from pumping her when she has that pee feeling. We ALWAYS stops when she feels pain down there she said her bladder is like exploding.

Tell me how can I convince my girlfriend?
I love to see & have her multiple orgams.
But she doesn't let me