I had just started high school and was new to the surroundings. I made friends easily and in a short time was familiar with everything. One day after a late study class, I went to the boy's washroom to pee. While I was standing at the urinal, another boy, whom I had seen around, came in and stood right beside me although there were many vacant urinals in the row. I finished peeing and was shaking it off when he said, 'If you shake it more than twice, you're playing with it you know.'
I laughed and said, 'I haven't heard that one before,' and zipped up ready to leave.
'Do you ever play with it?' he asked as he turned slightly around so I could see that his cock was hard and that he was slowly jacking.
'Sometimes,' I replied.
'Do you want to play with it now? There's no one else around so we have the place to ourselves.'
I hesitated a moment and then said, 'Okay sure,' and stepped back to the urinal and pulled out my cock. I started jacking my now-hard cock. We stood there quietly for a few minutes mutually jacking with our cocks pointing into the urinal as if we were peeing just in case somebody came into the washroom.
He said, 'Let me see your cock,' and I stepped back as my precum was just glistening the head of my cock. He also stepped back. I was so turned on I started to come, and I told him so. Then he held out his hand to catch my load (unknown to him this was my second time that day) then took my cum and spread it all over his cock while he continued to jack.
'Geez that feels good. Nice and warm,' he said as he shot his load into the urinal but back far enough for me to see him come. While we were washing up, we arranged to meet again after the next late study class.
In other sessions, which I will tell about another time, we started jacking each other as well as sucking.