I had known Arthur through our woodworking club for many years, or at least, I thought I knew him. This is a true story.
It was a long time ago now, when in my early forties and he was in his late sixties that we had arranged to drive over to the other side of town to visit one of our club members that it happened.
When only a couple of minutes from our friends place, Arthur detoured and drove to the local sports oval. There was no sport on this particular day, but there was a toilet block which was open. Seeing as we had both had a cup of tea before our journey began, I figured that Arthur needed to relieve himself. Still, this was strange as were so close to journey's end. I always wondered how he knew of this oval and toilet block but never asked. Arthur had worked out I was homosexual and our friend had probably as well. Being a local, maybe our friend had told him about the oval.
Arthur pulled up just outside the toilets and proceeded to get out and head for those toilets. Feeling the need, I may as well follow, and I did. Once inside we both went over and stood at the urinals and took care of business. Just before finishing, I realised that Arthur was glancing over at me and had a half erect penis. To say that I was caught by surprise was an understatement. We had known each other for years and he had not shown any hint of being interested in other men. After all, he was married, I knew his wife quite well and they seemed to be happily married.
I stood there not quite knowing what to do, but my rising erection, and Arthur, decided for me. He smiled as he reached over and gently touched my cock, playing with the knob before sliding his fingers up and down, stroking the shaft. It wasn't at all long before he was rewarded with a hard, strong erection. I was embarrassed but very aroused at the same time.