Jeff was totally gone now, just trying to feel up Simon's furry pecs, nibbling on his his huge nips. "Fuck, bro," Simon gasped, "you got a real nice fucking mouth." Simon let Jeff suck on his hairy pecs for another minute, then decided it was time to finish Jeff's conversion. "Alright, dude, time to make a real jock out of you." Simon started flexing his right arm, once again exposing his smelly jockpit, and slowly guided Jeff's face into it with his free hand.
Jeff's jaw went slack as he gazed into his former friend's pit hair. "Am I tripping?" he thought to himself. It looked to Jeff like a green gas was coming out of Simon's pit, and a tendril of the gas was approaching his nose as Simon moved his face closer to the pit. Jeff sniffed, and then moaned. Jeff's cock was now totally hard, and if Simon had been looking at Jeff's pants, he'd have noticed a wet spot.
"Just give into the stink. Let it bring out your inner jock." Simon said. "Give into the stink," Jeff repeated mindlessly. Simon kept his hand behind Jeff's head to make sure he didn't try to get away, but it was unnecessary. He could hear Jeff huffing and sniffing his pit stink like it was poppers. It felt like poppers to Jeff, too; he was getting light-headed from huffing all the stench, and the musk high was making his dick leak even more.
Simon was surprised to see that Jeff wasn't being jockified by the stink. Jeff's body had gotten toned from the first few sniffs, but then stopped bulking up. Jeff wasn't getting any hairier either. But his ass was getting bigger, forming a real nice bubble butt.
"Geeze man, that's enough huffing my stink. I think you maxed out on it, and it's all just going to your ass now. I think you gotta start licking up my jock sweat." Jeff obediently stuck out his tongue and begin licking Simon's pit. "Atta boy," Simon said, and jokingly slapped Jeff's ass. Jeff gasped and buried his face deeper into the jock's armpit.
"Fuck, why did having my ass slapped turn me on?" he wondered. But he didn't dwell on it, because he was too entranced by the smell and taste of Simon's rank pit. It was hard for him to think of anything else, both because he didn't want to get distracted from the awesome odor and because it felt like the stink was fogging up his brain. He was really light-headed now. Simon's jock sweat had grossed him out at first, but now he couldn't get enough of it. The taste was hard to describe. Salty and kind of earthy, sure, but it somehow tasted like concentrated alpha male, and each new lick contributed to a steady stream of pre-cum from Jeff's dick.
But the sweat still wasn't jockifying Jeff, just rounding out his bubble butt. Simon couldn't figure out why it wasn't working. "I guess only just became a jock today, so there's a lot I don't understand," he thought to himself. "But wow, what an ass!" He started grabbing it in earnest now, causing Jeff to moan again. Simon grinned. He had an idea of what effect all his jock sweat was having on Jeff.
Weird fantasies started to play through Jeff's hazy mind. First, he imagined Simon's pit hair and sweat glands growing around his head, into his nose, mouth, and ears, spreading Simon's stink deeper inside of him and pumping jock sweat directly into body. Next, he imagined himself kneeling before a naked Simon, looking up at him as Simon held Jeff's brain in his hand and used it to scrub his sweaty jock bod: first, his hairy chest; then, really vigorously, the humid jungles under his arms; next his legs and under his hairy feet; and finally (bringing Jeff to the verge of orgasm) his hairy crotch, with its obscenely thick jock meat and big, low-hanging balls. "Fuck yeah," Jeff muttered to himself as he realized his new purpose in life was to serve jocks and their hard, sweat-pumping muscles. He pictured the green gas from Simon's pit again, going through his nostrils and settling over his brain. He now envied Simon's jockstrap, which had so far better served their mutual purpose of absorbing a jock's nastiest sweat than Jeff had. Jeff thought back to the hallucination of Simon using his brain as a washcloth, and imagined it absorbing so much jock sweat over months of use that it turned yellow like the underarms of an old white tee-shirt, or like Simon's jock strap. With this thought, Jeff wrapped his arms around Simon's muscular frame, grabbed his shoulder, and pushed his face as deep into Simon's pit bush as he could for a last sniff. Then, with Simon still groping his ass, Jeff groaned and his cocked exploded into a mind-breakingly amazing orgasm.
Simon burst out laughing as Jeff collapsed to the ground. "Well, buddy, I thought I was going to make your life better by turning you into a jock, but I guess it wasn't meant to be. I don't know if you just weren't strong enough, or if you OD'd on my jock stink, or what. That's ok, though. Every self-respecting group of jocks needs a team fag to be their towel boy. Anyway, you obviously got off, so it's only fair you help me out now. And if that's what my fucking armpit does to you, I can't imagine what my cock's going to do."