When I moved out of my parents' house to study, I eventually found a place with four others -- 3 girls and another guy. We immediately got on very well, and I managed to maintain a coherent conversation with everyone despite my shyness.
The girls were all very attractive, and one in particular I thought was stunning. Slim but with quite large breasts, slender limbs and pale skin. She had thick brown hair that she tied back in a pony tail and when she smiled at me I would melt a little inside.
I started going out at night with my housemates, trying to dance and drinking too much. But I still hadn't had a girlfriend (although I told them that I had lost my virginity years ago). I was way too shy to approach any of the girls for something more serious, and as usual tried to compensate for my lack of communication skills by staying fit and working out.
My addiction to porn continued to develop, and when I wasn't being sociable or working or studying, I spent my free time masturbating and fantasizing about my housemate(s). I felt ashamed about this, but the shame actually became part of my fantasies. The more perverted I felt, the more intense the pleasure as I played with myself.
The exhibitionist monster had well-and-truly awoken in me, although my shyness prevented me from fully developing it. When I returned from the gym or needed to shower early in the morning, I started walking from my room to the bathroom naked, with a towel at hand in case anyone suddenly appeared. This was a very short distance, but the sense of danger and the thrill of being naked and possibly being seen always made me very excited.
Arriving naked and turned on in the bathroom inevitably led to masturbation. I knew from experience that attempting to clean up my pubes in this situation led to mistakes. However, as I was constantly turned on, and the experience of shaving was becoming increasingly exciting for me, I frequently ended up attempting to tidy up as I masturbated.
The same pattern repeated itself again and again: I would lather up my groin area, starting with my balls and shaft. As I progressed, I would remove a little bit more on one side than the other, and would have to shave a bit higher on the other to even it out. With one trembling hand stroking my shaft as the other shakily operated the razor, I would keep trying to even things out until the only reasonable course of action was to remove all of my pubic hair and wait for it to grow back out.