His shorts have a hole in the back of them

Zach tossed his towel into the bin and began getting dressed. His soccer shirt still smelled horrible and was caked in dirt at certain spots. His jockstrap was still damp with sweat, but Zach tried to ignore it. Finally, Zach pulled out his shorts. He heard a soft rip and felt the fabric catch.

"Oh no..." Zach pulled his shorts free, but another ripping sound came from the locker. The back of his shorts had caught on the metal inside the locker, and now a decently large hole was torn in the back.

Zach pulled up the shorts and turned to see how bad it looked. Pulling up the back of his shirt, the hole in the back of his shorts gave a perfect view of his ass crack. Zach flushed red and cursed.

He still had to walk across campus and catch the bus home. He would have to make the entire trip with his ass showing.

Unless...

Zach took a deep breath and pulled down the back of his shirt as far as he could. Looking back, he saw...