Bill had been impulsive and vague when he set this up, declaring that male "jocks" that transform are hunted between the ages of 18-21 for sport, nonlethally, male "jocks" genitals can be removed and become firearms causing remote and extreme orgasm when used as such, and male "jocks" with their genitals detached become Jockimals, merjocks, or something between anthromorphs or complete animals.
The distinction to qualify as a jock, in this new reality that Bill created on a whim, is the ratio of muscle mass to total mass. Now that bill changed the 1-2 week commitment each summer to a mandatory, federally enforced, 3-month ordeal, summer jobs are hard to get and keep for those aged 18 to 21.
The potential to transform comes with puberty and is often gone by mid 20's, but there are stories of men well into their 30's and 40's... who had their penis and balls taken and found themselves forced into Jockimality until they get their penis back... its a sign of powerful virility but also deeply humiliating to have your humanity ripped away from you.
The history of war changed wildly since armies are often built with young, strong, healthy men. Towns were defended by animalized humans, towns were raided and left as animalized humans. Now, it's considered a war crime to force someone into animality, and considered heinous to use a firearm-ified penis, especially theirs, to cause the trophification effects forcing a stasis of torment. So of course, the USA has made a sport of it and given it the cute name "Jockimal Hunting".
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Jeff made his way up the embankment, and into the woods... Ken's words resounded in Jeff's ears, "Trigger your transformation."
"The fuck do I do that?" Jeff growled in frustration. Unlike every other male here, Jeff only had memories of experimenting with getting himself off, not removing his penis to turn into a jockimal. It was clear that the transformation would be forced upon him due to not being attached to his penis, but how could he force something he doesn't understand? Even masturbating took him a couple of tries to figure out...
Jeff paused to catch his breath having gotten several hundred yards from the lake... "AARRGGHH!!" Jeff cried out loudly as a vicious orgasm erupted from nowhere sending a tingling across his body and blurring his vision momentarily. "Oh fuck!" Jeff had given away his position when his dad had shot Jeff's penis gun. If he had been running full speed he would have tripped or run into a tree. There was a continuous cacophony of shots and hollers from behind him, and his senses were muddled when it happened, so Jeff couldn't pinpoint his dad's position.
Jeff continued moving but could feel something happening in the back of his head and he realized it must be his body beginning the transformation, having never done it before, his body is taking its sweet ass time to transform and he doesn't know how to resist it or push it toward completion. Or even if he should! He knows he's becoming some kind of animal, but predator? prey? He doesn't even know! Being an animal he could probably travel faster, unless he becomes a snake, is that even a possibility? What if he becomes a moose? He'd be huge! Or an elephant! Oh god, he'd be a sitting duck!
Jeff noticed his arm and leg hair seemed to be thicker, seeming to confirm he is still some kind of mammal... That's something. He'd been traveling in one direction for almost 45 minutes, his navigation skills were shit and his speed was... not ideal... Jeff never thought he'd need to know how to evade predators in a forest as a beast otherwise he would have researched... something. There were probably guides online, videos, it was probably talked about in high school... all things every other jockimal had to rely on, save for him and maybe his friends...
His friends... Jeff wondered how Chad, Mike Jr., Tim, and Kyle were doing. They seemed just as surprised as he was but it seemed strange that his dad would specify his buddies' children to specifically not know what was going on and put them at a disadvantage. Jeff's vision blurred for a moment but once he blinked everything was crystal clear and in laser focus... it was disorienting... far away he could hear people chanting something... "We FIGHT for Jockimal RIGHTS!"
Protesters? Maybe he could find refuge there! Wait out his 4-day obligation and "AARRGGHH!" Dad shot Jeff's gun several times and Jeff somehow knew his dad hit something. A sensation of power swept over Jeff, different from his Jockimal transformation, and Jeff was left confused. still, he pressed on finding the trek a little easier than before...
What Jeff didn't know was that the hunter's successful aim with a Jockimal weapon enhanced the weapon used, and the jockimal it's tied to... In this new world, athletic men aren't a testament to their hard work and dedication... Instead, all credit is given to their father's good aim. These enhancements ensure the young man will stay lean and fit, making it most likely he will continue to become a jockimal for another year. This whole setup is a self-fulfilling cycle.