Jake opened the app, intending to reduce his size. That way he could actually hide his erection again. He opened the app, and was greeted with the three sliders, but the erect size slider was grey. On tapping it, it gave him an error message "Erect size cannot be adjusted while erect, please go soft to adjust erect size".
With horror, Jake realized that he was stuck in the mall bathroom with a 14 inch sword jutting from his crotch. Well, not really but it may as well be. Jake's cock was as thick as a bottle of Coke and more than double the average length of a male penis. He needed to figure out something! Jake tapped on the soft size slide, and quickly brought it all the way down to 3 inches, in the hopes that it might adjust the size of his cock even while erect.
It worked, to a degree. Jake's cock did shrink slightly as it was not 100% erect. As the horror further dawned on Jake, his cock shrank further, until it had retreated to a 5 inch semi-soft. Not enough to make the app's warning go away, it seemed, but that was fine. 5 inches was enough to hide, and he only had to make it home.
Jake quickly dressed and ran from the bathroom. Home was a 5 minute walk away, he could make it easily. Jake ran as hard as he could, trying not to think about the concealed monster in his pants...