During sexual intercourse, penile position may make less stimulation to the G spot. Or the wall of the vagina thickens due to the effect of the estrogen hormone. Due to those reasons, G spot regresses. Thus it losses sensitivity by the time. Even it may disappear over time.
In such cases, getting the G spot fuller and more prominent will ensure G spot to expose more forceful friction by the penis. That facilitates to stimulate, further enhances the sexual pleasure. Read more