<human>: Give me the gist of the text in a nutshell

When I was in high school, I often brought a flash drive to school to help me move files, work on homework, etc. One day I was in the computer lab finishing a lab report, and I accidentally left my flash drive behind. I later realized this and went back to find out if it was still there.

APPARENTLY, the band teacher had mistaken it for his own and plugged it in, saw from a file with my name on it that it was mine, and was giving it to the computer lab teacher to save for me. Just then I came through the door and saw him with my flash drive. "Ah!," I said. "My flash drive! You found it!"

He handed it over and chuckled with a wink. "Yeah, I eventually figured out it wasn't mine. The porn on there wasn't really my taste."
Boy did I chortle at his HI-LARIOUS porn joke. Classic band teacher. As I walked down the hall, however, my heart started beating incredibly fast and the horrifying realization that he may not have been joking came over me.

I ran to a different lab and plugged it in on a computer facing the wall. Sure enough, somehow I had left multiple galleries of porn in a folder on the drive. I'm a bit hazy on the details but there may have been a touch of tranny porn among the rest.

To this day, I'm not sure if that band teacher from high school made an easy flash drive joke, or if he had legitimately expressed his lack of preference for tranny porn while winking and nonchalantly returning it to me. Just typing this makes my head spin a little.
<bot>: I left a flash drive with... non-traditional porn in a high school computer lab, the band teacher most-likely saw it, and winked while returning it to me.