The A-spot (Anterior Fornix erogenous zone) is near the inner end of the vaginal tube. It is made of hard tissue much like the roof of your mouth. The area about 30 degrees left and right of the spot is also just as sensitive. The A-spot is just behind/above the the G-spot. Some women call it the 'epicentre'. Only stimulate it if you are already highly aroused. It can produce very intense Os.