Jim was out looking for a new pair of workout shorts since, the day before, he had burst his open from doing squats. He went into a sporting goods and apparel store to see what he could find. At the same time, a little boy and his dad entered the store. The dad was looking to get some pants for Little League baseball for his son. Ty looked at Dustin and said, "The little boy and muscle dude. Those two are perfect." Ty worked his magic, and instantly both the boy and the Jim felt very strange, like they had to pee all of a sudden. The boy told his dad he was going to the bathroom while Jim asked an employee where the bathroom was. Both of them entered the bathroom around the same time. Both of them felt extreme pressure in their crotches. Jim was leaning against the sink while the boy nearly collapsed near a stall. Jim pulled down his pants to see his large bulge start to shrink and get thinner. His balls were also getting smaller, and he felt a burning, as if all of his sperm was being burned away. The boy felt very uncomfortable in his pants as he began to feel his penis getting larger. He also moaned as his balls dropped and became as big as a pair of large eggs. He felt even more strange as balls began to churn, as he started to produce sperm for the first time.
As the genital swap completed, both Jim and the boy looked down at their own crotches and gasped. They then looked over at each other and their jaws dropped. They were about to start screaming when another, sudden pain came over them. What Ty had not anticipated with this genital swap was the fact that certain genetic information had been swapped. Namely, the boy was now producing Jim's sperm.
The boy's new penis began to pulse as wave after wave of testosterone was sent into his body. The boy's legs began to grow longer and more muscled as they matched Jim's legs. Jim's legs deflated and shrunk, losing any definition. Jim lost his balance and fell to the floor. The boy's waist and butt began to expand, giving him a nice chiseled butt, with a light dusting of hair, and a 32" waist. Jim, on the other hand, lost the firmness in his butt as his bottom and waist shrank down to match what the boy previously had. Next up was the torso area. Jim was practically crying as his chest, stomach, arms, and back deflated, losing all of their muscle mass. They were painful tears as he lost more height, settling at 4'2", losing nearly two feet off of his height. The boy winced as his spine cracked and he shot up to 6' tall, two muscular pecs appeared on his chest, a six pack formed on his stomach, his back stretched out, his shoulders expanded, and muscles exploded onto his arms. The changes then reached their heads and faces. The boy's face contorted as it was being changed to an older face. His jaw squared, his chin dimpled, and his jawline became strong. His eyes changed from brown to blue. Jim's face shrank and softened as he took on the boy's old face. The last thing to change was the hair on their head, which also began to alter their minds to help them adjust to their new bodies and lives. Jim's hair changed into a shaggy blond mop as he became William, a 3rd grader trying out for Little League. William was in the process of becoming Jim, or rather Staff Sergeant James Ruttiger. It was apparent that Jim was becoming a Marine as a sharp flattop appeared on his head, replacing his memories as a little boy with that of being a drill instructor and infantryman. After a few minutes of the two mindlessly swapping clothing, the two left the bathroom. William's dad wondered what had taken the new Willy so long. The new Jim bought his shorts and left, since he needed to get ready to report in at the duty hut to train his recruits.
Meanwhile, Dustin wondered if the swap had happened at all. Tyler told him it did, but that it changed their bodies too. The difference in physicality was just too different and the wish needed to balance itself out or the two could have been in a bad position. Jim would have lost the testosterone needed to do his job and Willy may have experienced some developmental issues. "Let's pick targets closer in age next time," Tyler said, and the two began to search once more.