With this first part story below in mind:

Josh scratched his head, thinking about his next move, then he smiled stupidly : he knew what he could begin with. He was a boy. And whatever the girls told, he knew something : size mattered. So... He sat on his bed, the dictaphone in his hand, thinking about what he should do. Being big should be cool but, how much ? Josh wondered, then decided to give it a first try. And if needed, use the dictaphone again later on.

His finger was circling around the record button, until he was sure. With his next record, he would probably feel less insecure. That would be great with girls. He pressed the record button and said :

"My dick is 9' inches long when hard"

He heard the sparkling sound and with just his night pants on, grinned as he felt himself pushing in his clothes. Growing was really a nice sensation. And growing where it counted an even better one. Looking down, he saw the bulge in his pants growing more impressive, and wasn't sure if it was just because of the growth or if his this arousing sensation was also making him go hard. He stayed here for a moment, contemplating his member growing in his pants, until he allowed himself to pull his pants with a finger to look in and saw a very impressive rod making him instantly proud. Noticing his whole package had grown, he touched it a bit and felt the urge to masturbate : he didn't need long to do so.

When he was done minutes later, panting, he surprised himself looking at the pictures in his bedroom : none had changed. He expected to be a bit more popular, now, and thought that his was stupid that his new self wasn't more... "popular". Hell, nothing the dictaphone couldn't change again !

His finger found the record button and he said :

"There are rumors at school about how big I am, and the girls heard them. Especially Kate. Yes, Kate ! She heard every single of them, and the words "Big" and "Huge" came a few times. So, now, the girls have something to think about when looking at me."

He pressed the stop button and heard the sparkling sound. With a smile, he went to check his pictures...

Josh grumbled quietly under his breath as he looked around his room, as if expecting something different. He wasn't expecting a harem of hot cheerleaders to appear into his room or anything, but he felt that suddenly boosting his junk up so much, and spreading so many rumors about it would have changed something! More pictures with girls, or memento's of past relationships, anything at all. But there was nothing.

Then the memories started to trickle into his head

They weren't very different, but he did notice a few subtle changes, and one bigger one. He could remember girls whispering more often behind his back or floating near him. more than once he'd caught a group of them staring at him from across a hallway or classroom, as if trying to catch a peak of something. He'd hear whispers of "its just a rumor, right?" or "it cant be true, not Josh." they they would giggle and move on to something else to talk about. The biggest change was how the other guys had treated him. He remembered that he had been more reluctant than before about undressing in the showers after gym class, usually doing his best to hang around and wait for everyone else to finish so he could have some privacy. Of course, being the geeky outcast he was, he drew the ire of more than a few bullies, several of which noticed his reluctance to shower with them. They would start teasing and taunting him, and very different rumors about him started floating among the guys in the school. "bet its like an eraser nub" or "If i were hung like Josh i'd be ashamed too" they would taunt intentionally within earshot of him before laughing profusely.

it wasn't until someone decided to pull off his towel in the showers and expose him in an attempt to embarrass him that the truth was revealed... How Josh was hung better than all but the biggest of the jocks. Unfortunately for Josh all this did was draw their attention more. Sure the taunting about him supposedly having a tiny penis was gone, but now the Jocks egos had been damaged, and they took it out on him with increased physical aggression. Josh could remember the times he was stuffed in a locker or thrown in a trash can having nearly doubled since they had pulled his towel off in the locker room. Worse still, with all the Jocks tormenting him so much, it did a great job of keeping most of the girls away from him. after all, who would want to go out with the guy that got dunked in the trash twice a week?

Never in his life did Josh think that having a bicker dick could ever have been a bad thing. It only went to show how dangerous and fickle the Dictaphone could be if he wasn't careful about using it. Unfortunately, careful wasn't the first thought on his mind after his new memories came to him. Revenge was. They had taunted him about having a small dick, and then got jealous when he was the rival of the 'alphas' of the jocks? well then he would give them a reason to be jealous."

Just confirm that you understand the story so far.