Conner had an idea. He copied over some of the stretching, lube, wastelessness, no-needs, no-objections, and body hair enhancements, before making some new changes to himself.
First and foremost, his cocks and balls popped off as a set, leaving a mildly sensitive bare crotch.
"Alright Tony," Conner said, "you go put this on and fuck Alex for me."
He knelt down and gently pushed his detached genitals into place on Tony, and felt them click in. "I'll take 'em back afterward and I'll feel whatever you feel while doing him, so don't rough up the cocks themselves just because I've made them more durable and skipped that refractory period stuff."
Tony pulled out Alex's plug, popped twin rock-hard boners, and went to town with ferocity in the time it took Conner to turn around and get back to the Chronivac stats. He'd set it so that the current bearer of the cocks would be sexually dominant, but he'd be the one in control and able to tell the others to back down and let him do Chronivac stuff or whatnot (and that he was the official owner and all). It took a few strokes across the blank expanse for him to get used to the sensation of the pounding his genitals were doing elsewhere. Looking at the boys' collars, he had the idea of getting a special lack-of-wardrobe himself.
Shucking off his own clothes, he set it so that nobody would mind his nudity, added a little blue pet collar and leash for himself, and eased a bunny-tail plug into his asshole as he felt another double orgasm from Tony's frenzied use.
"Y'know, I should keep you guys." Conner mused. He edited some location parameters and suddenly all three were in Conner's room at home, Chronivac computer set up anyway. "There we go, all mine. I could stand you being a bit bigger though..."
With a few more taps of buttons, Tony and Alex upsized to about how they'd look at 18 years old, with a bit more sizing so they'd be taller than Conner and some lithe but definite musculature there. Tony bulked up with muscle until he looked like a bodybuilder, but Alex just got a bit fatter so he had something of a musclegut.
"There, now I can tell you apart. Gimme my cocks and balls back, Tony." Conner said.
Tony whined and regretfully pulled at the base of his taint, causing Conner's genitals to pop off and leave him a dickless wonder again. He handed them over without comment, letting Conner judge the weight and lick them thoughtfully.
"Now, how could I secure this for use on the go..." Conner thought aloud, before coming up with an idea. Setting his cock on the Chronivac, he input a series of commands that'd fuse the machine into his balls and let him control the whole assembly mentally. It glowed slightly before swirling into his cockhead and becoming one, a series of mental displays popping up and allowing him to drive. "Alrighty, emitter mine. I'll let you guys plan things but I get to approve whether or not changes go through. Alex, you put on the cock and take us for walkies."
Pressing his balls onto Alex and pulling him upright, Conner pulled over his own leash and mentally lengthened it a bit, then handed it to Alex along with Tony's. Conner sank to all fours smugly and made some resistance edits so the three of them wouldn't be affected by crawling around on hard surfaces. Sauntering smugly forward to let Tony and Alex trail behind him as basically decorative assistants, he let his cocks spring to arousal. Alex whined with lust, to which Conner let his cocks start dripping precum but not actually reach orgasm, to keep the poor boy on edge. Alex started yanking Tony's leash a bit just to constrain potential excitement, but otherwise let Conner decide the pace.
The neighborhood was pretty quiet at the moment, leaving a lack of observers for Conner to get off on being seen by. That could be arranged later, he had another cock-sharing idea to try out. He'd give Tony and Alex their cocks back...but they'd be drinking each others' piss and cum as pacifiers. He twitched his cocks, and it was so. The boys felt blessed bladder relief as the pressure unlocked, finding their mouths stuffed with the others' separate manhood, balls hanging out onto their chins like guard-parts. Then came orgasm, the boys forced to swallow load after load until Conner felt sufficiently amused to unlock their cum levels and let them finish.
"Good boys." he said. "Alex, put those two things just above my cocks and we'll get a nice quadruple-cock going, I'll make it a big dick plate or whatever. You boys might get to try wearing each others' shafts individually later. For now it's all stored on mine and Alex is just holding it."
Alex complied, pulling his cock from Tony's mouth and plopping it into place, alongside Tony's that he spit out. The two additions to the collection began to leak pre once more. Conner gently pulled the group into continuing forward march, and thought about what to do next. Well, if they weren't meeting anyone on the streets they could always force the issue by going somewhere much more populated.