Before Jeff insterted his member, he had used Chronivac again.
He set the machine to swap body hair between him and Jack. The machine warned
"Are you sure? The swapped elements will be placed in the same place but on the other body. The exchange alters both participants."
He hit ok and set the timer to perform action right after he released the load in his old man's ass. Which, by looking at Jack's amazing body and submission, would happen very soon.
He was pushing the head of his penis slowly into dad's cheeks, watching as he moaned from pleasure.
"Do you like it, dad?", Jeff asked seductively
"Y-yes, a lot!", he said, groaning right after
"Do you want more?"
"Yes, please!"
"Are you going to cum soon?"
"I am!"
"STOP. You are not allowed, until I say so!"
"Why? Please let me!"
"Some changes will be made before..." Jeff said firmly "From now on, I will be the alpha male of this house! Do you accept it?"
"What... but I'm your fath-"
"DO YOU accept it?!" son said dominantly and stopped pushing to make his dad want it more
"Y-yes..."
"I'm not sure you said it truthfully." Jeff said, just to mess with him some more
"I will obey you, son. I will do what you desire" Jack said, resigned
"Good. You may cum, when I order you to do it"
Jeff started pushing again. He had to agree, his father's meat worked perfectly. He never got to enjoy such amount of pleasure playing with his old, average cock.
The new one opened a whole new level of delight. That, combined with the ultimate stamina created a perfect match.
The climax was about to come. Jeff started pushing and pulling furiously, hearing his dad (or maybe servant?) whine like a little bitch. This turned him on even more.
"NOW!" shouted Jeff. Jack obeyed and they both cummed simultaneously. Jeff's new penis released a flood of cum, overfilling muscled body's hole and flowing down from it.
Jack's penis released only a few drops. Jeff grinned as he watched his father feeling ashamed of such miserable dick. It was clear, who is the real man of the house now.
Soon the next element of his father's masculinity would be Jeff's.
Immediately the Chronivac began working.
Jack's muscled, beefy, and hairy body lost its 2 days stubble, his flattop black hairstyle, bushy pubic hair and all other hairs, including its magnificient chest hair.
Jeff's skinny, smooth, and young body lost its dark blonde, regular haircut and his short, sparse pubic hair.
The exchange was to be done. All the hairs flew above them finding their original place. But on the new owner. The action lasted no more than a second or 2 and none of them really noticed it, since they were both still intoxicated from the sexual intercourse.
The first one to notice it was Jeff. As he opened his eyes, he saw smooth, muscled (and wet) butt and "his" shorter, but still massive dick. He quickly realized the hair transplant has completed and his dick was still as big as it was before, it was just partially covered by "fur" he acquired. He ran his one (now hairy) hand over the beautiful hair he had on his chest and the other one over his head. Discovering the stubble and firm hairstyle, he got a hard-on again. Now Jeff wanted to see his dad's reaction.
Jack was unaware of the changes until he stood up. At first he seemed surprised and excited when he noticed his dick got bigger about 1.5 inch. The illusion didn't last long however.
He quickly realized, by looking on the pubic hair, his hair color has changed and, sadly, it was not his dick getting bigger, but his pubic hair shorter and sparser.
Then he touched his muscled arm and discovered it was smooth. By touching his beefy legs, feet he quickly discovered, his manly hair disappeared.
When he felt his chest smooth, the sadness came. His masculinity was on the edge of destruction. Jack rushed to the bathroom to see the changes.
He looked in the mirror shocked. He was still packed with muscles, no one took it from him. But he looked... odd. The regular, dark blonde hairstyle didn't match his toned abs and pecs. Gone was his stubble too.
Then Jeff entered the room. He stood firmly and seemed very proud of his hairs, especially the one that covered his chest and hands, feet, ass, thighs...
He was covered in hair. Jack noticed Jeff's hairstyle and was about to say something, but Jeff began first.
"I didn't know you were so smooth, dad. Not a single hair on your body I see." said Jeff, filled with pride and satisfaction
"But I looked different a moment ago. I shouldn't look like that." Jack didn't have a clue about what happened
"How so?"
"I.. I mean, your hair look so similar to mine as they were moments before. I remember that I got that hairstyle when I was in the army years ago. I also remember stubble scratching my arms when we fucked and somehow I'm smooth as a teenager. How is this all possible..."
"Does my manly hair bother you? You feel ashamed of your minor hair? Or maybe you feel jealous?"
"You can't look like that, so-"
"Bullshit. You just can't stand the fact I'm superior male in this relationship. Look at my body - it screams "I'M A MAN". And what does your body say? "Fuck me, please". The only thing that keeps your masculinity in one piece are your muscles. You can't undermine my authority as a dominant male, dad."
"Well, maybe... Please, don't be mad at me, I still love you."
"I love you too, but you deserve a punishment. Something that will remind you to NEVER question my position. Let me just think about it..."
Jeff knew his dad had to be punished, but he didn't know yet how...