All females have G-spots. The corresponding male “G-spot” is the prostate. The difficulty is in locating them. Wikipedia has some articles that may help. Books that get into medical and/or anatomical language can also help. Reference the question/answer you mentioned above. Dictionary.com says the following:
Gräf·en·berg spot /ˈgræfənˌbɜrg, ˈgrɛf-/ Pronunciation Key – Show Spelled Pronunciation[graf-uhn-burg, gref-] Pronunciation Key – Show IPA Pronunciation
–noun
a patch of tissue in the front wall of the vagina, claimed to be erectile and highly erogenous.
Also called G spot, G-spot.
[Origin: 1980–85; after German-born gynecologist Ernst Gräfenberg (1881–1957), who is credited with first descibing it]
Following is an excerpt from the book E.S.O. (Extended Sexual Orgasm), beginning on page 34: Locating the Inner Trigger – the G Spot
An important and little-known feature of female anatomy is an area in the vagina that in many women can help function as an orgasmic trigger. It’s not usually sensitive nor even palpable except at high levels of sexual excitement. Some sexually experimental couples have known for years of an inner trigger area, but it was first mentioned in the professional literature some thirty years ago (book published in 1983) by a gynecologist, Dr. Ernest Grafenberg. And only in the past few years have sex therapists appreciated the important role this area can serve in the orgasmic process.
It’s variously called “the twelve o’clock spot,” the “inner trigger,” the “Grafenberg spot,” or “the G spot.” It’s an area of tissue in the upper front wall of the vagina, varying in size from shirt-button to coat-button, just behind the pubic bone, which is the bone you can feel above and toward the front of the vagina. The G-spot trigger area is located on the vaginal wall about one and a half to two inches in depth at the twelve o-clock position. Sometimes it’s more toward the eleven- or one-o’clock position.
It normally can’t be easily felt. The best time to locate it is immediately after a woman has had orgasm. It is then already somewhat enlarged and sensitive. If a partner presses the G-spot trigger area with one or two fingers and strokes it at a rate of about once a second, a woman mentally open to the experience will usually become more sexually aroused. Experiment with alternating lighter and firmer pressure. Be guided by your partner’s response.
The next-best time to locate the G spot is when a woman is near orgasm. If her partner continues clitoral stimulation manually or orally, when he identifies and strokes the G spot she may crest over into orgasm.
Pressure on the G spot may feel uncomfortable at first. It may produce an urge to urinate. That’s not a sign that a partner should stop stimulating the area. He should simply lighten his stroke. After a minute or so of continued pressure and stroking, discomfort usually gives way to pleasure.
With continued stroking, the G spot increases in size, hardens – much as the clitoris and penis do – and is then easier to locate.
What exactly is this inner trigger area? There are several theories. It may be sensitive because nerves from the clitoris pass through it on their way to the spinal cord. It may be an area surrounding the female urethra which contains a vestigial prostate gland. Gynecologists and pathologists agree that the area does contain some paraurethral ducts that are similar to the male prostate, and as we will discuss later, stimulating the male prostate helps to trigger a deeper male orgasm in many men.
My copy of this book was published in 1983. I purchased two copies between 1996 and 1999. Authors names are Alan P. Brauer, M.D. and Donna J. Brauer (his wife).