Hi. This happened when I was younger, around the same time all my friends and I were getting interested in sex and stuff in early high school. After school swimming, our P. E. teacher always made us take a shower in the open-aired change room.
Normally, I was in and out of the shower, quick as a flash. But one day the coach kept me behind in the pool to demonstrate how to freestroke better to me (I swum always with the head above water). As a result I was running late.
When I got to the showers, only one of my classmates remained. This was Mike, a tall, slender boy with a cute smile. He was better developed than the rest and I always felt a little queasy and lovesick in his presence.
When Mike stepped out of the shower, he must have been having sexy thoughts, because he popped a giant boner. I couldn't believe how big his erection was. He also had a nice, dark bush. His buck naked body was so beautiful, I thought.
Stripping out of my speedos in the main change area because all the stalls were wet with the footprints from other boys, I became aware of Mike watching me undress. He seemed to linger as he toweled himself down and dried his hair. Casually, he walked over to me at last and accidentally brushed his still-hard penis against my thigh. My heart was racing so fast I almost passed out.
'Nice cock,' he said, very casual. 'Uncut?'
'Um, really?' I mumbled. I was only four inches.
'Yeah. You should let me jack you off. I know you'd like it. Here, let me show you how on mine first.' Mike circled a hand around his chubby.
The next few minutes were the most surreal of my life. I watched the boy I idolised play with his dick, while I struggled to pull on my shirt and singlet. Who knows what would have happened if our female teacher didn't call for us to hurry up from outside the showers, as the bus was ready?
That night I went home and humped my pillow twice. I dreamed about Mike doing naughty things to me and with me, and hoped to see him again in class. I started to enjoy swimming lessons, too.