I like to swim naked a lot, in the sea. I have this kind of 'vice.' One year ago on one splendid morning, on the little caribbean island where I spent my vacations, I had just finished my daily swimming. I remained in the sea for a while, just floating, looking to the sky, or with my head in the water, looking at the wonderful submarine landscape.
Perhaps because of my happiness and the gorgeous sense of freedom of that precise moment, my dick began to get erect and all my body got extremely excited. I started to masturbate intensely. When lot's of semen from my cock started to spurt out into the sea, I could not believe my eyes. Dozens of small beautiful coloured fishes began to eat my cum and almost fought each other over it.
This was one of the strongest experiences (that I repeat as often as I can since that day) that connected me with the planet, that I have ever had in my life.