The Grafenberg spot is an area on the anterior or front wall of the vagina, between the opening and the cervix, which is often found to be extremely sensitive to stimulation. It is thought to be perhaps analagous to the prostate gland in men.
Female ejaculation is the expelling of fluid from or around the urethra.
This fluid is not urine, and is often accompanied by a powerful orgasm. Stimulation of the G-Spot is thought to potentially cause this. Insert one or two fingers in the vagina with the palm facing the pubic bone. Gently bend your fingers 'forward' so that they stroke the anterior wall of the vagina. You may feel a raised spot or series of ridges, or you may feel nothing in particular.