Jake had been stroking his tail for quite some time. His tail seemed to react vividly based on where he touched it. Feeling the base to the tip, every bone, every... Muscle... Jake's mind started raving again. He pulled out his laptop and started typing "gain muscle mass".
The credentials were important for him for this change. He wanted his muscles to be massive,but not too big he couldn't move. He figured 80% would probably do. And with how good his tail felt while growing it, he wanted the pleasurable sensation to continue. So alongside bulging muscles, his dick and balls would grow in size as well. He had also added custom settings to his boxers, so while all his other clothes would be shredded, his boxers would expand to support his bulge.
Self aware: yes
Bystander aware: no
Pleasure: yes
Timer: 01:00
Everything seem to be in place, so without a moment, Jake pressed enter.
Within seconds, he could see his chest growing. His chest and abs were already booming and gaining mass. He started to rub his new bulbus chest and moan in deep pleasure. His biceps were next swelling intensely against the fabric of his clothes. It didn't take long for them to rip and shred his t-shirt in tatters.
His forearms were starting to gain definition as well, creating nice and vainey paths pleasing to look at. Now his lower body was getting some love. His legs and calves started gaining mass ripping his jeans instantly in the same way his shirt tore. Next up his butt started to balloon up, gaining more mass and adding to his hot price of tail he already had. His tail also grew thicker and more vainey, which caused it to wag slightly.
Last but not least, his crotch area feels a burning sensation like no other. Your dick an balls felt like they were on fire, but in a satisfying way. As Jake looks, his dick starts growing. Longer and wider with every second counting down. Same with his balls. They grew from coconuts, to watermelon size in a matter of seconds.His boxers practically turned into elastic so they weren't gonna rip anytime soon. As soon as the timer hit zero, Jake's dick and balls received one last surge of growth, making his dick flop out from his boxers and letting out some cum.
Jake had been lying on the floor experience his changes. Muscles still throbbing and tail still wagging. Finally getting up to examine himself, Jake saw his dick was about 15 inches long, and as wide as a stump. His balls also grew fully to the size of beach balls. The only things that had stayed proportional was his head, hands, and feet. Jake's neck had been buryed in his pecs. He was feeling good.
Stuffing his dick back into his elastic boxers to contain his excitement, Jake ponders on what to do next.