As a boy in my early teens, growing up in a small village by a lake, I enjoyed swimming and the semi-open men's dressing room by the beach, enjoying the presence of the guys older and more mature than I. Sometimes I came for a swim and there was no-one in the dressing room -but could have been any moment- and I used to rub a load thinking of the mature boys, and my load would hit the coarse wooden wall boards -and stick
Some years ago on the Greek island of Kos, I had a hotel with an open deck on the flat roof. You could see buildings near by, also you could be seen. One late evening I climbed on the deck, and saw a window open and lights on. A nude M/F couple were making out and about to start fucking. That gave me a hardon, and I whipped my dick out and started to rub slowly. The guy in the window saw me in the sway of the street light, and got excited that I was watching. So he started a performance for me, fucking the girl so she could not see me, but making sure I could see all, and he'd have a glimpse towards me on the deck occasionally, too. I shot my load just as they came