A couple of days ago I had to do a survey in an empty flat. It was very hot so as I did not think anybody would be there I wore some very, very short shorts that were very tight fitting to keep cool and a loose sweatshirt. No underpants or socks, just flip flops. After I had been there awhile I decided to take my sweat shirt off to keep cool as it was boiling in the place. No sooner as I had done this the door opened and a man of about 55, very short and very skinney walked in. He too had shorts on, although they were knee length, but very loose and floppy. I don't know why, but I like very short, very skinney older men. It has been something with me for years. I certainly fancied this one but you need luck to get away with that. He explained to me that he had to do some repairs to the flat and so I thought I couldn't lose anything by chatting to him. Who knows, he may fuck like a trooper. He seemed quite happy to chat and I found myself talking for quite a long time to him. Then I noticed that every now and then when I looked away, as I looked back his eyes shot up again. No, I thought, surely he doesn't fancy me. I mean to someone who fancies men I did look very attractive in just my very tight shorts and my cock was also outlined against the shorts. Slowly I started to feel randy and my cock started to get longer and bulge more in my pants. Then I felt some pre cum and I thought let him have a look at that. So I deliberatly looked away for some time and sure enough when I looked back he had been staring at my bulge. Fuck it, I thought, let's put on a real show for him and see what happens, so I again looked away but this time I started to make my cock move about a bit and it also got bigger and bulged more. I did this for some time and I noticed he did not talk while I was putting this show on for him. It was obvious he was staring at the moving bulge. When I looked back at him he only slowly moved his head up from watching my cock and so I looked down at his shorts and was thrilled to see he had a hard on like you cannot imagine. His cock must have been enormous becuase it bulged out for what seemed like miles. I decided it was time to get him really going so I said to him that I wanted to show him something out of the window. I went to the window and stood as much in front of it as I could so to see out he would have to stand right behind me. He did just that and stood very close indeed, but not quite touching me. I then bent over a little so my arse was against his stiff cock and he responded by pushing his cock against my arse. With his errect cock against my arse I pushed even harder onto him and wiggled my arse around a bit and soon I felt him move his buttocks around and pushing his cock really hard against the cheeks of my arse. We didn't speak but soon I felt him moving his hands around and sure enough he had dropped his shorts and pants and them started to pull my shorts down. I helped him until they were on the floor. He then pushed his soaking wet cock against my arse cheeks and then between my legs, so I bent over and he pushed my head right down and started to feel for my hole with his cock. Soon I felt his cock against my hole and then he grabbed my thighs with both his hands and started to push as hard as he could. A bit of his huge head went slightly inside my hole. He pulled back a bit and then shoved again, this time much harder. I could then feel his errect thick cock entering my arsehole. It went in very slowly, but very deliberately. He kept on pushing and all the while it went inside me deeper and deeper until I could feel the hairs of his body against my arse cheeks. Once he was fully inside me he started to wriggle his cock around. Then he pulled out and pushed back and started to fuck me. Slowly at first but soon he got faster and faster. He only did this for a few minutes when He said he wanted to come and did I mind him shooting his spunk inside my body. I said I did not and that I liked that and so he started to fuck me much faster. Soon he was going mad on me until suddenly he let out a yell and said "I am coming, coming". Then he started to shoot spunk like I have never seen before. He just kept on shooting spunk into my belly non stop for what seemed like ages. He shot and shot spunk inside me until eventually he just stopped and slumped down on my back exhausted. After that we got dressed and said almost nothing else. I left before him and just said goodbye and that was the end of it.