Love this site!
When I was 20, I had to make a boat delivery by driving a really slow boat. It was a 30 foot launch that could only go about 6 miles an hour. Because the boat was so slow, and I had to leave so early in the morning, nobody wanted to go with me. I was going to be stuck on this boat alone for the next 16 hours.
The plus side was that the scenery was awesome, and the weather, mid-August was fantastic. After the sun finally came up, it was clear, blue skies, and around 85 degrees. Also, to make things even better, there was almost no waves to deal with.
About 4 hours into the trip, I decided to take off my shirt to get some sun. This lasted for about 20 minutes until I realized I was fairly off shore ( about 1 mile ) and there were no other boats remotely close to me - so I took off my shorts so I could get an even tan.
The sun felt great on my body and skin. And I enjoyed the ride for a while. As I could drive the boat with only minor course corrections, I could lay back and enjoy the sun. I began to have fantasies of people on shore seeing me driving the boat naked, and getting excited themselves. I had one particular fantasy in which I thought that a woman looking through her telescope could see me naked, which excited her - and caused her to begin masturbating.
I remember sitting, standing, and posing in erotic ways for a fictitious and horny woman. As I sat there in one position, the vibration from the engine helped along a growing erection.
I was really enjoying the feeling of the sun, the vibration of the engine, and the fantasy of some unknown woman masturbating herself because of me - and I began to touch myself slowly and sensuously - I was pretending that I was on display for somebody else. I would touch myself, and use the precum lubrication leaking out of my penis for more lubrication, or I would taste it, or rub it on my sensitive nipples for even more sensations. Not only did I want to feel the sensations, I wanted the observer to feel the excitement and respond to their own excitement in their own way.
I think I masturbated for 20 minutes of more touching, showing off and feeling the excitement. As my excitement built, I stood up and ejaculated a larger than normal amount of cum over the side of the boat.
To this day I sometimes use these images to masturbate to.. and I sometimes wonder - maybe there was a woman at a window enjoying the show