Public toilet wank

When I was 18 I had a job whose daily commute involved a 15 minute bus journey into town and a 60 minute journey out the other side. After an hour on the bus on the way back I'd often need a pee and it didn't take me long, young and innocent though I was, to realise that there was more going on in this huge bus station toilet than just the emptying of bladders. My girlfriend at the time was very turned on when I told her about this and encouraged me to explore a bit further :) A while later I went in one evening for a much-needed pee and took up a position hidden from view of the door (hard to describe but urinals were troughs in free-standing pairs facing each other so that by choosing one at the back of the room where you faced the entrance you were screened from the chest down by the trough itself) and at the other end of a 10 foot trough from an older guy in a business suit. I was about half-way through my pee before it dawned on me that he was taking a long time shaking off the last drops and when I sneaked a peek out of the corner of my eye I realised that he was stroking a semi. I immediately started to get aroused so by the time I'd finished my cock was already starting to swell and I made a big show out of squeezing and stroking and shaking it. My admirer was audibly moved by this (something between a groan and a grunt) so I made no secret of watching him stroking his cock - stared at it really! I was very nearly fully hard by now although I was still pretending to be milking the last drips of piss out of my cock. He moved over to stand next to me and before long the two of us were wanking furiously side by side. I still remember his cock like it happened yesterday. It was long, easily over 7", with a slender shaft and a huge purple helmet. You can tell I was deeply impressed at the time. He pushed his cock towards me a couple of times as we stroked, I guess he wanted me to stroke him or to rub our cocks together but I wasn't up for it at the time. When I think back now about what I'd do..! By now I was having difficulty holding back and eventually got so close to the edge I had to let go altogether and pumped out a big squirt of precum hands free. My new friend groaned again, started wanking double-time and almost immediately started to cum. And he came and he came, powerful spurts again and again. I'd never seen anything like it (obviously!) and of course came immediately too. I well remember the two of us standing there cumming together and the sound of our cum hitting the urinal. [fuck I'm so hard now as a I write this and remember some of the details that weren't front of mind at first] After it was all over I was literally shaking, so drained was I by the experience and couldn't move for a minute. Then I panicked, stuffed my cock away and legged it! My new friend tried to follow wanting to swap details so it could happen again no doubt but I could barely cope with digesting what had just happened without planning to do it again. I sometimes think about what might have happened if I'd been bolder that day. I know my girlfriend would have loved me to have brought him back to our flat so we could all play together for instance :) Can't write much longer - other matters are coming to a head ;)