There was a time some 20 years ago when I was quite the jogger. I was particularly into jogging when the weather was very hot.
One July afternoon, I set off for a run. I had not had an ejaculation in a while, so I was quite horny. I usually wore the spandex pants underneath another pair of shorts due to my modesty. This day, I decided against going with the outer layer and took off. I was visiting some friends that were out in the country, so the roads that I was running were not well travelled. As I was getting warmed up, I noticed that my cock was starting to swell rubbing against the spandex and it was quite obvious what was happening due to the unforgiving nature of spandex. Usually that would be a problem, but due to the fact that I was out in the country, I was into it.
I started to fantasize about different events and feeling the soft up and down motion of my cock within my shorts, when I noticed that I now had a raging hard on that there would be no hiding if someone came by. That thought actually was a turn on, so I just kept running. The bouncing around was about all that I could stand but the thought of running down the road as exposed as I was turned me on beyond belief and I wanted that feeling to last. As with all good things, I got to the point I felt that I was going to explode, I ducked into a row of corn that I was running beside, collapsed onto the ground pulling down my shorts as I fell and screamed out as I orgasmed.
I didnt seem to care if anybody heard me at that point and just shouted right out. My ejaculation was as powerful as any that I had experienced! That by far was the single best experience that I have ever had outside. If I could have, I would have layed there and gone again, but the intensity of my orgasm was such another erection would have been impossible for a while. I left my deposit with the corn and continued on my run. True story.