Shower room encounter

I had a fantastic experience yesterday, my last day on a short trip to Italy. I had to check out of the hotel AM but our flight was 9pm. So I spent the afternoon at the pool, and was given key to the Spa changing room to shower before leaving. The changing room was empty, with two shower cubicles tucked away in one corner. They were separated by a transparent modesty screen, so I showered and had almost finished when I heard someone come in from the pool area.
I glanced around and recognised a lad who'd been sat sulkily at the pool with his parents and younger sister. When it became clear he was heading for the shower, I decided to pretend that I hadn't finished and started with the shower gel all over again.... Out of the corner of my eye, I saw him drop his boardies and slink wordlessly into the next cubicle.
I could clearly see his brown shoulders and white butt cheeks. My cock stiffened and my soapy hands were drawn to it... He was facing away from me, using shower gel all over his body. My cock was thick and hot, as I rubbed it slowly. He ignored me, and continued to wash everywhere. He kept his back to me throughout, but as he was just 6 inches from me!! I thought I'd faint when he bent forward to rub his knees... I wanted to touch, but he continued to ignore me. I wondered how long I could stay before it became too obvious…

[to be concluded]