Oh boy does it exist! But it’s more like a set of very sensitive nerve endings in that particular area, so it’s not a raised spot, nor does it have a particular shape, so it’s hard to locate, especially if you’re a fellow, because you’ll only know you’ve found it when your partner lets you know. Also it’s pretty far up in there, so most women may not have found their own, yet, either. It’s in an awkward spot not easy to reach.
Also, a fellow is not likely to hit the spot with regular missionary style sex, because the spot is located on the upper wall of the vagina (if you were looking at the vaginal tube, the upper wall would be toward to the woman’s stomach, rather than her back) so when a man goes in for missionary sex, he’s not thrusting towards that spot. It’s much easier to target if the man enters a ladie’s V from behind her or if she is in the top position.
But the difference between a regular O, and one that happens when the G-spot is engaged is rather spectacular.
Turns out that there’s at least one other spot that is similar on the back of the neck.