I have always been cripplingly shy. Unfortunately, that doesn't stop my hormones taking over my brain, and as a younger man especially I would spend days on end fantasising about girls I was too shy to talk to.
After finishing school I continued living with my parents for several years. Just after getting home was the only time I could really give in to my desires in our tiny house, so I would inevitably drop my things and start masturbating. A department store catalogue was material enough, and just getting naked was enough to bring me close to the edge.
I was terrified of my parents walking in and catching me, so I would occasionally creep to the front window to look out for their car.
One day, I dashed to the window and then suddenly had to reel back - this really cute girl was walking past the house on her way home. Brown hair drawn back in a pony tail, pale skin. Her breasts were outlined through her sweater, and I saw the line of her thigh through her skirt as she walked. I stood in awe of her for the full minute it took her to pass out of sight. With a groan I gripped the window sill as I came, desperately trying to catch all of my semen with my other hand. Her beauty turned me on, obviously, but the fear and excitement of standing naked by the window and her almost seeing me turned me on even more! I started spending more and more time masturbating near windows. Often I wouldn't see anyone, but the thought of her and the danger of standing near the window was an intoxicating mix.
Porn had had its influence on me of course, and I was aware that perhaps I wasn't as attractive naked as women might like. Porn stars always seemed to have massive cocks and neatly trimmed pubes. I resolved to make myself look as good as possible.
One evening in the shower I built up the courage, lathered up and grabbed a razor. It was actually surprisingly easy to shave my balls, and I was amazed with how sensitive they were. I didn't even make it to the next morning without making a mess of the bed, I was so aroused.