"Actually Dad, I want to leave this up to you. I know I've been tying you down since mom left. Come on, you had to know that I knew I was a mistake child. You have a 25 and a 21 year old, and then you have me. I'm not much that athletic or impressive, and I'm sure that I am a disappointment athletically too."
"Son, you know I love you-no matter how good of an athlete you are. Let's just forget about this and send it back. Things are just fine the way that they are"
"No dad, here's how you program the machine. I want you to make me the son that you can be proud of"
Jeff's dad felt guilty for what he was feeling, but he knew that Jeff was right. He never wanted another kid, and he knew this was his chance. He also knew that Jeff was miserable with school, delayed puberty, and all the other ills that befell him. He took the machine and started to make changes.
He started by adjusting his age to 19, his height to 6'3" and raising his weight and body mass. He increased his testosterone level by three times as much, raised his heterosexuality to 99%, and lowered his body fat to 2%. When he was done making the changes he went to his son and gave him a huge hug, "I hope this is what you want my boy." With that-he pressed enter.
Immediately Jeff doubled over in pain and began to scream. He slowly arose and his entire body began to stretch as his legs lifted him to his new height, and his arms and torso lengthened to match their new wingspan. Through the pain Jeff grinned at his dad for providing him with what he had always wanted. Soon cracking and breaking could be heard from his face. His teeth cracked and reshaped into a perfect white smile. His nose and chin sharpened and became extremely well defined. Soon his hair fell to below his chin and his blemish free face.
The growth soon took over the upper part of his body. With his arms swelling to almost unreal proportions,his pecs swelled and a ten pack appeared just below them to his groin. His waist shrunk to a size 28 as his entire being transformed into a perfect male v shape. Soon his legs and calves were swelling to match.
Suddenly it was all over. Jeff stood there in only his briefs which now stretched on almost all sides. Suddenly Jeff, who had never orgasmed before, felt an unholy tingle in his groin. Despite the fact that his father was standing right there, Jeff began to stroke and cup his package that grew right before his eyes. Jeff ripped the remaining clothes from his body as he let loose his very first load.
His dad smiled with pride. "Welcome to manhood my son."