I was driving down the M5 and started to feel really horny. I was just coming up to the turn off to Cirencester, when I remembered a lay bay with an old fashioned gents loo off the dual carriageway a few miles up the road. You had to drive one way ,turn off and drive back the way you came to get to it. I found the lay-by and there were a few cars and lorries parked up there, so I pulled up just by the loos. I remember feeling a thrill in my stomach and a tingle in my cock as I got out and I thought, "this looks promising" ! As I went in ,it was dimly lit and there was no-one in the first section with the urinals, but I put my head around the doorway in the next section and sure enough there were a couple of guys with hard cocks wanking each other. They looked up and saw me and one of the guys lost his nerve and walked out leaving the other guy behind. That guy had a lovely erect 8" cock, which I went over to and took in my hand and started wanking it, as I did so I got my cock out and the guy started wanking mine. I then noticed that the guy who had left had returned and was slowly wanking his cock in the doorway while he watched us. I went down on my knees and took the 8" cock in my mouth and the other guy walked over to us and I took it in turns to suck each cock. The second guy came very quickly and shot his spunk up the wall behind me and quickly disappeared which left me to concentrate on the lovely 8" cock. I was licking and sucking for all I was worth and at the same wanking my own cock while kneeling on the floor. Then I felt the tell tale signs of a man about to shoot his load and sure enough found myself half choking on a lovely ,salty, mouth and throat load of semen. All this time, i was still wanking and found myself shooting spurts between the guys legs. We cleaned up, thanked each other and drove off our separate ways. Altogether , a very enjoyable diversion from my journey.