"You think this is fun?" Ivon sneered at his humiliated son standing there with a raging boner. "Think volenteering to bacome a pony slave for life was going to get your rocks off. Well we'll have to do something about that. I'm having you neutered before you can even begin to enjoy yourself." Tony cried out in his gag with real fear in his eyes. Like he should have. Ivon continued.
"Maybe I'll even have that pathetic dick of yours removed too." Tony started crying.
"Actually father, I have a similar but related idea for it instead," Max said, smiling slyly. He whispered something to their father and Tony was worried to see the approval in their father's face.
"Alright, but get it done now. I don't want to see that thing as my son one second longer than I need to." Tony tried to beg through his gag, but it was useless. And before he realized it, he'd been drugged with a needle. He went out like a light.
Max watched the surgans do their magic. It would have been easy to simply have the chronivac do the alterations, but Max wanted it to feel more real. Besides, he'd changed reality to have far better medical technology now. Especially when how rich the family was. Tony would be healed up and without a hint of any scars by the time he awoke.
The surgeons had cut away his scrotum and placed Tony's testickles inside himself. Now they were bringing his penis down between his legs and into a tight tunnel they'd created into himself. His penis would be perminant forced so far between his legs it was insane himself. In fact, it was aimed right at his own prostate.
For urination, the tunnel opened up in a narrow piss slit inside his own ass. So that when he urinated, the piss would fill and clean out his rectum. And the constant stimulation of his prostate would cause him to self lubricate his ass with precum.
Just to add to the fun, Max had ordered a remote controlled vibrator and a shocker installed right where Tony's trapped erection would meet his own prostate.
As the surgans closed the wound and healed it seemlessly with a spray, Max pondered what other changes he should give his pony while he was at it.