It was last period of the day and I had PE. We were using the gym equipment and I had made a bet with Josh. Whoever could do the most pull ups would get £5 off the loser. Josh went first and did 25 pull ups. I thought it was strange that he didn't do anymore as Josh usually did plenty. Anyway, it was my turn and I jumped up and grabbed the metal bar. I lifted mg self up so my chin went above the bar then went back down. I had done around 15 pull ups. I pulled myself up again but as My chin went over the bar, I felt a cool breeze on my legs. Josh had pulled my trousers down in front of my whole class. I was wearing very tight blue boxers today so my they outlined my dick.
The laughing only made me more determined to beat Josh. I pulled myself up again. Just before I did my 25th pull up, Josh punched me in the balls. I fell, landing on the floor with a thump cupping my balls.