A nice day to be outdoors.
I once drove to what I believed to be a secluded part of a lake for a swim. I swam for distance along the shoreline to the bottom of a cliff with a wooded area at the top. I climbed to the top of the cliff.
I watched the blue sky, white clouds and waves on the lake from the cliff top. A gentle breeze blew across my body. I decided to strip off my bathing suit. Being a horny 20 year old at the time, I soon had an erection. I stroked myself off until I came.
When I finished, I put my bathing suit back on. I looked up to see a man and a woman sitting in a car watching me. I didn't realize that I had been standing in front of a path through the trees to a parking lot. From the look on their faces they were either shocked or turned on. I didn't stick around.