Hey Doc I have an extremely high sex drive, and if im not having sex or know im going to have sex soon, i wank like there is no tomorrow. I was on a different anti depressant to what i am now, and on the previous one, i could not reach orgasm or have much feeling in the pecker. One night i pleasured myself for hours and the head of my penis looked like it had gone 10 rounds with tyson. Ever since, these grazes, war wounds have healed but have left a red scar kind of mark all around the base, of the head of the penis. It also becomes dry, and dry skin can flake away. I have been with one woman all my life and for 13 years, im 29. As far as i know she hasnt slept around but im worried what i have may appear to look like a STD.