One time in junior high i jacked off in class.
That's gross. Did you get caught?
Nope, I was really careful not to.
It's good you didn't get caught since you probably would have been expelled. Jacking off in public is innappropriate and clearly no one in the room consented to you doing it.
I was really desperate and horny at the time.
I get that being a teenager is a wild time, but I hope it was a lesson learned in being more appropriate in public. How are others going to feel that someone around them could be touching themselves? I believe you should save those urges until you're at home.