I have always been sexually aroused when naked in the outdoors.
As a middle school student I went to a school in Southern California, that was located between the ocean and a 5000 feet coastal mountain range.
I always wanted to get up near the range peak, lower my jeans and underwear, and stand on a tall rock and jack off looking at the town and ocean below. Masturbating was exciting to me.
I had been building an old motorcycle for trail riding and planned to ride up in the hills, and masturbate in the open, looking over the whole city and ocean.
Time came when the bike would be done by Saturday. All that week I'd sit in the classes with the mountain view and get an erection, anticipating Saturday's ride there on my motorcycle.
Saturday came and early on I made a bag lunch and said goodby to my mom.
In about 40 minutes of trail riding I reached the peak. It was a beautiful view of the city below, and ocean spreading out to the horizon.
I got off the bike, climbed a tall outcropping, lowered my jeans and underwear and my penis sprang out. I don't know if it ever got any harder.
I was proud of it, seven inches long, straight as an arrow, and about one and a half inches thick.
I had a tight circumcision and found the tight skin and exposed glans allowed an incredible feeling when rubbed with two fingers, or cupped hand.
With saliva on my hand the feeling became more intense. Some precum was emmited from the end and rubbed my hand over it to increase the mositure.
I began rubbing and looking at the scene below. It was the most incredible sensation I had ever had. I'd come close to climax, slow down, and do it again. This went on for two or three times until I couldn't stand it and let go a huge stream of cum that went about six foot. I almost passed out with the effect of the orgasm and increased by the other visual effects.
I was shaking when it was over and had to sit down.
I later got married and have a wonderful sex life but this one I have never forgotten.