It was something about being alone and naked in a public place that started to turn him on. The fact that someone could walk in at any time and take a shower in the next cubicle without realising that he was standing next to them, wanking.
His tee shirt was stuck to his back with sweat, darkened in patches between his shoulder blades. His shorts hung over his arse and, where they too were heavy with sweat, they clung to his cheeks and accentuated their roundness.
Pedro crouched a little, holding onto the railing for balance and peering through the ironwork. The nerd had removed his hand and Pedro could see a lump in the track suit. The nerd clicked onto a new page, the picture on the screen went white.