Cum Nerve
On a mans cock, a region which varies from man to man, but usually about 45 degrees off of the end of the piss slit and on or just below the cockhead, which when stimulated with the tongue or other wet mouth surfaces, can cause an immediate orgasm. The discovery of this nerve on a man may render him completely at ones mercy.
I lightly teased his cock head with my mouth and tongue before turning on the suction to full and then diving in and going full force, bathing his Cum Nerve with that wet sticky saliva that only true cocksuckers can make.