Some years ago we had a solitary male cleaner who used to come into the office at about 5.15 after everyone else had gone. I used to stay a bit later and take the opportunity to look at a few websites I shouldn't have and have a bit of a play with myself while watching. At that time I was in an open office and could keep an eye on where he was but he must have got wind of what I was doing because one day he came straight down the office to start cleaning near where I was and he could see the screen. (He was in his late 40's and married he later told me.) I only had enough time to get my cock back in my trousers but not clear the screen and it was very obvious what I had been doing.
He looked at the screen then me and smiled but just carried on cleaning.
The next evening the same thing happened so I didn't make any attempt to clear the screen even though I had got my cock back inside my trousers but with the fly still gaping open. This time he came over to look at the film more closely which involved homo and hetero sex but I could see him looking a lot at my erection in my trousers. He said something about him appreciating that sort of film as well and that he had some at home. He was wearing some loose jogging trousers and I could see his cock sticking out inside them, but then he went and carried on cleaning.
It was a week later when I saw him next and I had already made up my mind not to try and hide what I was doing. When he saw me sitting behind my desk he made his way over and I just continued masturbating openly. He smiled and stood a little way beside/behind me to watch the film but I could sense he was looking at my wet cock more than the screen. I could also see his hand at the front of his trousers gently rubbing himself. After a couple of minutes I told him I was going to the toilet to get rid of 'this' and he said not to worry if I made a mess he would clear it up.
I tucked my cock away and turned off the pc and went down the office to the toilet. We have two hand basins on one wall with a big mirror behind them so I dropped my trousers and pants and watched myself as I wanked. I was getting closer to my cum when the door slowly opened and he came in. He watched me wanking and asked where I was going to spurt and I told him into the hand basin then wash it away. He said why didn't I just let it go on the floor and he would wipe it up. He was staring at my wank and nodded when I asked him if he wanted to see me cum so I turned to face him and just spurted it onto the floor.
I leant against the basins to recover and could see his hard in his trousers so asked him if he wanted to cum as well. He said he would but later at home when he was fucking his wife.
It was a couple of nights later when I saw him again and he came straight over to where I was sitting. I was openly wanking with my cock sticking out of my flies and he watched me and the film. I invited him to pull up a chair if he wanted and he did then asked me how safe was it here. I told him that the door could only be opened with a key from the outside but if he liked I would put the catch down so no one could come in without knocking.
When I got back to the seat he was watching the film and made no attempt to hide his hard-on in his loose trousers. I undid my belt and dropped my trousers and pants before sitting down and sat back as I rubbed myself so he could plainly see it. He then took his trousers down and I saw he didn't wear any pants. His cock was a little bit longer than mine but a bit thinner and I openly looked at it as he started doing the same as me.
After a little while we both dropped the pretence of watching the film and I spun my chair to face him and we just looked at each other as we wanked. I asked him if he had liked watching me spunk off and he said he did and would like to see me do it again. I said I would like to see him cum as well so he suggested we went into the toilet as it was easier to clean the floor in there rather than the carpet.
We tucked ourselves away then went to the toilet and dropped our trousers again. I told him I didn't feel too comfortable so I removed my lower garments completely then took my shirt and tie off as well so I was virtually naked. I loved showing myself off to him completely and was able to wank openly and aggressively as he watched. He was pretty turned on too and I could see his strokes getting faster and asked him if he was close. He said he was so I said for us to try and spurt together. We both started at about the same time and the sight of his spunk made my cum all the harder. Although his was a little greyer than mine and didn't spurt like mine does it was very thick and made a 'splat' as it hit the floor.
We both cleaned the ends of our cocks and I got dressed as he wiped up our combined cream with some toilet paper and flushed it away. We talked for a while without any embarrassment and agreed we would like to do it again when the opportunity arose.
We didn't see each other every night as sometimes I would be out on a site visit in the afternoon and not go back to the office. This happened quite a lot. Other times I would be waiting for him but he wouldn't show as he had some cleaning to do elsewhere as well and sometimes went there first. It was about once a fortnight when we did get some time together which made it all the better to look forward to.
The next time we did anything I saw him come into the office and gave him a wave from my chair. I was already wanking and as he approached I asked him if he wanted to drop the latch. As he walked back I could see he was already getting a hard-on in his trousers and when he came over to me and saw I was out he dropped them and sat down. I had a film on but we were both interested in looking at each other again and I openly looked at him as he stroked himself solid. He was sitting back in his chair and on impulse I reached forward to his cock and started rubbing him. He looked a bit surprised but took his hand away and let me just masturbate him then after a little while asked if I would like him to do the same to me. I just eased forward and offered him my penis and it felt lovely feeling another hand than my own on my most intimate place. It was also thrilling to feel another mans hot hard cock and watch his foreskin slip back and forth over his glans.