A vibrator works on individual’s who have no damage to their prostate. I have tried a few of them, and nothing happens. That is, no release of ejaculatory fluid / semen. A normal male’s prostate can be palpated with a finger inserted at least two inches into his rectum. Because of my double-digit prostate operations, my prostate has moved up toward the body cavity. Now, it is approximately 5.5 inches up, or into, my rectal wall.