After hearing Dick's offer, James looked at Marcus moving his penis body like if it was a snake.
Marcus was his best friend and he knew that what happened to them wasn't his fault. However, what Dick did to Sam's body was really interesting cause he always wondered what would feel to the older.
"How can I do it?" James told Dick who immediately grinned after hearing it.
"Simple, focus on his mind and push it inside the balls." Dick said while he made some gestures with his hands. "If you feel that they're filling then it's a signal that you're doing fine. You will get an extra ballsy sack as a plus!!"
James stared at his unconscious friend before he tried to follow Dick's instructions. He didn't know how he was doing it but he can feel Marcus' mind and memories moving down to his balls leaving a empty space big enough for him to take control of the whole body.
"Ugh!" James moaned and immediately after he realized that he did it through Marcus' mouth. "Holy smokes!! I'm Marcus!" He began to check himself. Arms, legs, head, everything. He was in complete control of Marcus' body.
"Cool, right?" Dick smirked as he stared at him. "And don't get me wrong, because I don't have problem with your actual look but I prefer a more mature company right now." Dick looked around James before he kept talking. "Come on, do it! I'm sure you can make a good man of your friend's body."
"I don't know, possessing him it's enough invasion of Marcus' life. I don't want to make him older." James stared at the penis and testicles where he pushed his friend inside.
Dick stared at James and immediately realized that the kid was having doubts that he could use in his favor. "Ok, I understand you. But if you don't experience it know maybe you won't have another chance later." Dick wickedly grinned. "Start slowly and in a specific region. If you feel it's wrong then you can turn back without too much remorse."
James thought about it for a brief moment before he decided to give it a shot. Almost immediately and apparently unconsciously, he was making Marcus' genitales older. The testicles were slowly growing bigger and hanging lower, the cock was doing the same as it lengthened and thickened until it overcome lower than the big balls. Like a stop-motion picture, wiry pubes began to sprout from above his dick and around his testicles at the same time that veins were becoming visible and the skin tone was getting darker.
"Oh jeez!" James moaned through Marcus' voice. "That felt so good!"
"I told you." Dick grinned while he watched the kid gently stroking his new adult package. "Try somewhere else."
James seemed too aroused by his new genitals that he didn't say anything but he started to change Marcus' hands. They grew big and calloused while he used them to stroke his mammoth turning it rock-hard.
"You're enjoying it, huh?" Dick smiled while he stared that James so horny that he can't stop jacking off. The growth was quickly spreading from his hands through all of his arms, they were growing hair and muscles proper of an adult than a boy or a teenager. James looked like a gorilla with those manly arms but still childish torso and legs.
Slowly, the growth started its way through Marcus' chest, his back and shoulders widened and which each breath he made it seemed that his chest was pumping up too. He didn't get visible pecs but he wasn't fat either.
From the bottom, his feet had already gone from size 7 to 12, the manly toes wiggled and curled continously while little kinky hairs grew above them and made their way through the legs in a very similar way they did on his arms.
The noodle legs quickly got meat and muscle as they lengthened. Those thick thighs were more suitable for the adult set that was hanging from his groin. Obviously, the kinky hairs followed it until his tree trunk legs were hid under a forest of hair that kept its way through his belly, surpassing and covering his navel until it connected with the hair on his chest and around his nipples.
He was almost done except for a thing, his head. Marcus' chin got more chiseled and his face got a mature look, his eyebrows thickened a little and his nose expanded too. Interestingly, he only got a short stubble on his jaw in contrast with the dense hair on his body.
"I think you are done." Dick told to the newly grown boy. "I would say you look good but, you know, that isn't your body!"
When he heard that, James quickly recovered his senses and immediately stopped what he was doing. "Oh god, no." He said in a deeper voice than before result of a prominent lump in his msnlier neck. "This is completely wrong! I have violated Marcus' body doing this!"
"Surely you have!" Dick grinned while he looked at James in detail. "And your friend will be a very hairy guy, look at those hairy butt cheeks!" He spanked them and James jumped in surprise.
"Oh no! This definitely wrong." James said while he watched the hands that belongs to an older version of his best friend. "Forgive me, Marcus."