I have recently recovered from a bout of - probably self-inflicted - temporary penile damage.
Usually one to use the old vaseline etc. during the said activity I recently stopped using lubrication over a period of time due to a change in the location of my routine (or to put it more simply, I started wanking in front of the computer instead of the TV).
Not too long after I developed an annoying tingling sensation in the upper part of the undersection of my penis whenever I ejaculated/urinated. Probably the best way to describe the sensation is that it was vaguely reminiscent of the sensation one experiences when you get 'pins and needles' in your feet/legs (ie. one of the latter go to sleep).
Very, very cumbersome - moreso because I presumed at the time that I was stuck with this new condition permanently.
Research on the internet threw up a whole array of possibilities, but I was most worried about the possibility of (permanent) nerve damage in my willy.
Fortunately, a consequent resumption in the use of lubrication seems to have cured the problem.
Cheers, and remember - whacking off without your lube might upset your dong.
To save the keyboard and penis at the same time use a tissue with lotion it provides the comfort your tool needs and some extra sensation to the nerve endings, no sticky keys unless you spray them and clean up is half way taken care of. My lady uses on me while we surf, caught me off gaurd at first but it works for me.
I've never had a problem like that and can't think of what irritant could have cause it. rough skin, dry skin, foreign substance on your hand, uncircumcized, hammering it against a desk or other blunt object?
One night I was jerking off while searching the net for a few hours getting pretty worked up. Well I just happened to look down and to my horror saw my dick and my hands covered in blood! Guess I got a little to rough with myself!
I too have yanked in the rough for over thirty years, and on occasion have rubbed raw from over-yanking.
There have been skin breaks on the shaft from time to time, generally where the skin stretches the tautest, on top, right behind the head, and one time there was blood. That's when I determined that five and six times a day was a little much.