Reading Argon Cyclists story reminded me of a similar experience I had some years ago. Like him I find the sight of another guy pleasuring himself exciting and this is one of my voyeuristic experiences.
I had been aware that the third floor offices in the small building opposite had become vacant. I was in a similar small block directly across from the building, with only a very narrow street between us. The street was pedestrianised so you can imagine how narrow it was. My offices were on the fifth floor so I had a direct view into the empty offices.
Across from them in my building there was a private club so there were no windows but mine onto that side.
Sorry about the scene setting but it explains the action which follows.
I became aware that a team of workers had moved into the empty offices opposite to re-furbish them. Then one day there was just one young guy painting the window frames.
He was wearing bib overalls with a tee shirt underneath.
He was tall, well built and probably about 17 or 18.
He painted steadily for a little while and between taking and making calls and general office work I would go to my window to have a peek at him.
As I watched I became aware that he was painting with his left hand while his right hand brushed over his crotch and occasionally gripped it.
He was feeling himself up as he did his work.
After a while, and I was transfixed by what I could see with a hardening cock in my pants, his right hand slipped into the side opening of the overalls which were obviously undone.
There was a little adjusting from which I guessed he was getting his dick out of his underwear.
He started the regular movement of his hand back and forth and all the while he painted.
This went on for a while, slow and steady, stopping and starting as he built himself up.
He bent over and propped the paint brush on his can of paint.
Stepping back he undid the bib front of his overall.
He slipped it down to his thighs as he sat with his back to the wall behind him, which I was relieved was directly in my sight.
He was wearing white boxers and sticking straight up out of the fly was a big, thick uncut cock.
He lifted his ass off the floor and slipped off his underwear which
joined his overalls in a bunch at his knees.
Up went his tee shirt over his head and I saw a tanned, well muscled chest with very little hair in the middle making a trail all down his body.
Now he settled into his session.
He touched his nipples, played with his balls and slipped down and raised his ass as he fingered it.
All the time this was happening I could'nt see his face but it was such a hot sight, it was as if he was putting on a show.
You could tell that this young guy really knew how to play his body and he was very very horny.
He touched himself all over as he slowly worked his uncut cock. His finger went to the tip and he tasted it. When he would stop jacking his hand would go to his balls. Sometimes his left hand went lower and I could tell he was touching his asshole.
He made it last a long time and then he brought his legs up by bending his knees.
He aimed his cock at his chest and jerked hard and fast, his head thrown back.
I didn't see the load on his chest and stomach because he was in shadow when he shot. He stayed still for a while then got to his knees. Now I could see his chest and stomach were covered in his load.
He reached for a rag on the floor and wiped it up cleaning his hands as well. As he stood up to start pulling his clothes back on he looked at the wall against which he had been leaning.
I saw him lean forward and wipe something off it.
He had shot so hard it had gone over his shoulder!
Slowly he tidied himself up and had not long gone back to painting the window frame when an older man arrived!
Minutes earlier and his supervisor (I assumed) would have caught him cock in hand.
I had to leave then myself for the bathroom to take care of my own pressing problem.
It's one of those hot memories that is still fresh 10 years on.