As a typical horny red-blooded teenager I would jerk off at least once a day. Those were the days when I could really blast some thick loads. On special occasions when I had the house to myself, I would edge for an hour or two before making a large mess which I would clean up with a handy towel.
I was 17 at the time, in prime shape and enjoyed showing off my muscular body. I became an exhibitionist after this incident. My very attractive cousin Michelle who happened to be a year younger had apparently stopped over to see my sister. I later found out she knew I was home alone and was actually hoping to catch me doing exactly what I was doing.
I knew I had the house to myself for at least a few hours and was stripped naked on my bed paging through a few porn mags, oiled up and just keeping myself on the verge of orgasm. The reason I never heard Michelle enter was because she had quietly entered the back door and had crept to my bedroom door which wasn't completely shut because I wasn't worried anyone would be home for hours.
Having enjoyed the edging for well over an hour I was nearing the point I was going to let loose. I flipped to a few pages that always helped me get off. I completely remember the slapping sound of my hand pumping up and down my cock, I started to moan and just as I let out a grunt my bedroom door opened all the way. Cum started to spurt up onto my face and chest as I stared into Michelle's eyes. She had such a lovely look of surprised awe as she watched my cock continue to spurt.
I was frozen there but was having such an adrenaline rush from having my very pretty cousin watching and completely enjoying the sight. With her eyes glancing from my spurting cock to my face, I pumped myself a few more times and milked out a few last smaller spurts. I had to have let loose at least 9 or 10 large streamers along with a few small spurts. I was covered in cum.
Michelle's words will always be etched into my memory, Oh my God that was a lot of cum, That was so cool to watch.
My cock was still twitching but not subsiding as I reached for my towel to cover up. Michelle apologized right away for barging in but said she also glad for what she had seen,
Michelle and I did a lot of experimenting with each other after that, on the sly. We fooled around a few times until I went to college. But really used to love jerking off for as she would rub off at the same time.
Anyway that's how I became an exhibitionist. Lots of women have watched me orgasm and they are all very fond memories.