I was walking down the high street of the small town where I live and stopped into the mens public toilets. I often go in to see who is in there, and more often that not end up playing with someone's cock or having a wank. This time it was quiet, no one around, so I went into the single cubicle, which is quite spacious but has no lock on the door. I sat there wanking, and soon heard the sound of someone walking into the toilet. He pushed open the cubicle door, which I made no attempt to close, and just stood watching me masturbating my cock with my trousers round my ankles. I recognised him as someone I had met up with in the past for a wank. He closed the cubicle door behind him and took out his own cock, which was about seven inches long, quite slender but with a big cockhead. I started to suck him whilst still sitting down and it felt great. After a while, he told me to stand up and started to fondle my cock and balls. Then he started gently stroking my arsehole with his fingers. He could see that I was loving this, so he pushed the tip of his finger inside me, first one, then another, and finally he had three fingers up inside me. I felt as though I was ready to cum, so he bent me over the toilet and I could feel the head of his cock pushing against my tight bumhole. I was quite wet down there, so when I pushed back a little bit, the head of his cock slid inside me. The feeling was great. He slid his cock right in, and then began fucking me really hard until I could hold out no longer and began to orgasm. My spasming hole was gripping his cock really tightly, and this made him shoot his load deep inside my arse. He zipped himself up and went, just leaving me standing there with an arsehole full of spunk. As I walked home, I could feel it running down my legs, and this turned me on so much I had to bring myself to orgasm again with my twelve inch vibrating dildo.