On holiday recently, I had occasion to be on my own for several hours. I was horny as hell but my wife had gone out with our kids to the beach. I tried to think of ways to masturbate and decided to try a vacuum flask, which had been left at the apartment we were staying at. The mouth of the flask appeared to look a tight fit for my cock as I have a very thick cock, about 2.5' dia. and about 7.5' long. So I proceeded to put my dick in the hole, but it was a bit too tight, so I lubed it with some saliva. The mouth of the flask was ribbed because of the thread when you screw the stopper into it. But this added to the incredible sensation I was feeling as I plunged my fat cock deep and long into the flask. I regularly lubed up the mouth as I plunged in and out and got into a regular tempo. The feeling was great and my cock felt like it was going to explode so I pulled out and stopped. I use the 'stop-and-go' technique a lot when I masturbate on my own, so I was able to resist spunking up. Then after a minute or so, I plunged my cock deep into the flask again-it was so good with my balls hitting the flask top. I then decided to take the flask upstairs and put in between the mattress and the base of the bed. The height of it was perfect as I knelt down and plunged my cock deep into the flask again. There was a mirror on the dressing table so I put it on the floor so I could see my fat cock going in and out of the flask. It was a beautiful feeling seeing my cock go in and out and in and out.... I lubed up again with my saliva and entered the flask one last time as I knew I couldn't last much longer. I pumped away really hard and fast; the ribs were sliding against my cock as I fucked away. I just couldn't hold on any longer and released my spunk into the flask. My cock pumped and pumped and the tight feeling against the flask mouth was soooooooo good, very different to my wife's pussy which is spongy and wet but easily accommodates my fat long cock. I kept pumping for 30 seconds or more, it was so incredible. I pulled my cock out, which was dribbling with very hot spunk. Since my cock had been enclosed in the flask and I pumped away fast, my cock had got very warm, but it was a great feeling. I then washed out the spunk, which seemed to be much more than I normally produce. I put the cleaned flask away and 15 mins later my wife arrived back from the beach, with me looking all innocent!
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