Closest I ever came to this was early morning at a rest stop 4:30-5am I was in the bathroom and older guy was already in there. As usual I always peek im not sure if he caught me peeking or just decided to stare in my direction but I looked over he gave me a nod so I gave one back then he starts stroking his dick after I finished pissing I stroked mine to. Like I said he was older and not really attractive but the experience of what was happening and it being the first time had me the hardest I had been in years you know how it gets so hard it points upwards? I came shortly after he came then he just puts it in his pants wash his hands and walks out doesn't say anything. I went to go catch up with him but I seen him walking with and holding onto what I assume was his wife which was kinds awkward. Still a hot experience though.