Just last week I was down at the river fly fishing, I was just walking through the long grass as always, then I saw something out of the corner of my eye..... a young couple having sex. At first I thought ha ha been there done that, Ill just walk on and leave them to there fun, but then I thought well they cant of heard me so I moved slowly closer for a better view and was pleased I did :). I stood about 15 meters away from them hidden in the grass watching them, her on top grinding away such a sight, I slowly and quietly masturbated till I cum, then backed away without them knowing and carried on fishing.