In a condition called pelvic prolapse, a woman's vagina can literally fall out and hang between the legs. Pelvic prolapse, however, can often be fixed.
Some researchers believe that the G-spot (the Grafenberg spot) lies two to three inches inside the vagina, on the anterior wall (near the belly button), just under the urethra. They believe this area has a different texture than the rest of the vagina and may be a remnant prostate gland. Other researchers believe that the G-spot does not exist.