"I really need that stone", you said with a stuttering voice, "Please if you found it...". You looked at the girls with whimpering eyes. The girls looked confused, and not quite as sympathetic as you had hoped. Clearly these three weren't of the highest class of virtuous people, empathy must be somewhat alien to them. You almost got angry, you glanced at your body's pockets wondering if it was in one of them but before you could steal it from your body...
The kid suddenly grabbed your body by the arm, and said "Sorry girls, I'll talk with this little guy". He took you to a nearby forested area with some privacy. "This is your body, isn't it? Don't bothered answering, I already know." You stared at him with big eyes. "I was confused, being in your body all of a sudden. I wished to know what was going on and here we are." You glared at him. "Then give me my body back." The kid shook his head. "I know everything, guys like you that would hitchhike somebody's body without thinking of the moral implications? You ever though of how my life was with that thing? How embarrassed I've been? Don't bother answering, You don't, after all I already wished for all your memories to be mine."
You grimaced. "I'm sorry, okay, can't you just wish me back to normal now? You can make any wish, you can improve your life." The kid grinned. "I'm fine with the current situation. As for your punishment... since you wanted to feel how it is to be a hung young teenager how about you experience it first hand growing up? I'll even make you even bigger than me." You gasped. "wait, what, no..."
You gasped and looked around. You realize you were somewhere else than just a moment ago, a bedroom. Upon further examination, you realized it had your clothes and bed. Rushing over to the drawers, you noticed a lot of shorts and T-shirts. You noted that you had a lot of underwear with a pouch in the front. Looking down, you realize the bulge in the front of your shorts has grown... a lot! "No...NO!" you cried as you ran to get the ruler. Running back to the bathroom, you start to feel the slightest weight increase in your underwear.
Once in the bathroom, there's no denying it: your bulge is bigger than in the park. Pulling down your shorts and your underwear, you stare at your cock. When you place the ruler next to it, it's clearly much longer, although not that much thicker. You measure at 9.3 inches soft. Pulling your underwear back up, it's a tight fit even with the custom pouch which was clearly designed back at your previous dimensions. The bulge is ridiculous, especially on your scrawny teenage body. The outline of your long cock is clearly visible through the fabric. You sigh, knowing that you have to grow up like this.