In late freshman year of high school, I saw a hot shorter girl wearing a very low cut top showing a lot of her (fairly large) boobs in the hallways while going to the bathroom during class. Made me have a boner for literally 3 hours straight with precum and all. It was the one time I debated jacking off in the school bathroom, but I didn't end up doing it because multiple kids were already caught doing it and shamed for it.
Went home that day and cranked the absolute shit out of my hog. I'm well above average down there, but I always wear extremely loose fitting pants because it's more comfortable, so I don't believe anyone was able to see my dick which was good. I hope it didn't smell or anything, I don't remember if precum smells or not.