“Hey, Kory! Check out what I got!” Rodney had been bursting with excitement the way over to his boyfriend’s apartment. The small orange furred and blue skinned monkey had a box that he was carrying with him. 

“What’s up?'' The monkey’s boyfriend was a wild dog by the name of Kory. With brown fur with white spots and curly dreaded hair atop his head, the usually relaxed and laid back canine was curious to know what the primate was so excited about. 

The canine was sitting at his desk, working on a graphic design project on his computer. Sitting in an office chair, he simply swiveled to the right to face the primate. 

“The stuff I ordered online came in. That growth stuff I was talking about!” Rodney explained. 

“Oh man. You actually bought that stuff, Rod. I told you that stuff is a scam.” 

“Not this one. I did my research and this one. It’s got tons of reviews and pics from others who bought it as proof,” Rodney said with full confidence. 

“Alright then,” the wild dog said. Rodney could be a bit stubborn sometimes and the canine found it was best to just let the monkey learn for himself. 

Still undeterred by his partner’s words, Rodney set the box down on the table and carefully unearthed one of the sealed bottles. Kory decided to humor his boyfriend until the bubble would inevitably burst. With Kory’s eyes still on him, Rodney didn’t hesitate to pop the cap from the bottle and take a big swig of the liquid inside. To his surprise the flavor was slightly sweet and the drink itself was fizzy. He was practically drinking a very light soda. That made it easy for him to take big gulps of it. The liquid went down easy and flowed into his stomach where the fizzing sensation remained. The bottle wasn’t very big so it didn't take him long to finish the whole thing. 

“How was it?” Kory asked. 

“Not bad. Like a really watery strawberry,” Rodney said. The wild dog chuckled and shook his head. While he expected nothing more to happen the short monkey was already feeling a bit strange. That “fizzy” feeling had been centered in his stomach but it was spreading out to the rest of his body. He was feeling warmer too and groaned a bit. 

The sound got Kory’s attention and when he turned around in his chair again his eyes widened. At first the wild dog thought it was his imagination but as he continued watching it became very clear that this was really happening. Rodney hadn’t even noticed it himself at first but it was hard to ignore his arms, legs, chest, and the rest of his body expanding and bulking. They were all swelling in size and gaining muscle too. 

Being an avid skater and overall athletic, Rodney was already in good shape. His abs were becoming more pronounced and his otherwise flat chest was getting puffed up. He gained a set of pecs that continued to expand with the rest of him. All over he was getting buffer and bulkier. In addition to his body’s growth, the monkey was also getting taller. Starting at four feet tall, the blue skinned primate was already at Kory’s height. This caused his clothes to be ripped from his own body and it was quickly revealed that Rodney’s loins were affected as well. The monkey was already hung before but his 12 inches had grown substantially in both length and thickness, making him even more hung. When the monkey’s body finished changing he was looking more like a gorilla in some respects, with a full chest and a plump toned set of asscheeks that he flexed while feeling and looking himself over. 

“Holy shit! It works!” Rodney exclaimed. “I’m fucking huge!” 

While the monkey based in his newly formed body Kory was still sitting in the chair, his mouth agape at the sight before him. His eyes were scanning the monkey’s body. He was so much bigger now, his body swollen with power. The muscles he had shown easily through his light down fur and his blue skin was taught with hard muscle being so easy to see underneath along with thick veins that kept blood circulating. Rodney seemed to have not noticed but his huge cock was erect and swinging between his thick muscular legs. Kory was staring directly at it and Rodney soon noticed when his gaze was finally on his boyfriend. 

Maybe it was Kory staring at it so intensely or maybe it was the sudden surge of testosterone but Rodney suddenly found himself feeling very aroused. It wasn’t just a want but an intense NEED to satiate this sexual hunger. His cock throbbed and he felt how heavy his bigger balls were. Having his gaze locked on Kory he approached him and had no trouble lifting the canine up from the chair and onto his feet. He pressed his mouth to the canine’s and began roughly kissing him. Kory was stunned for a moment before he embraced and returned the kiss. He moaned in Rodney’s mouth and began running his hands along the monkey’s body. 

In addition to the monkey’s taste, Kory’s keen canine nose was already picking up on Rodney’s musk, it being more intense that his usual natural scent. He felt his mouth watering and Rodney’s tongue overpowered his own, dominating the kiss they had been sharing. Being also the one to end the kiss, Rodney pulled his head back, panting softly and licking the saliva from his lips. 

“I wanna fuck you so bad!” Rodney said with a deep huff. 

“Do it then,” Kory said, having a lustful edge to his own voice. 

Rodney picked his boyfriend up, hoisting Kory over his shoulder and taking him to the bedroom. He set Kory down on the bed and then presented his huge cock to him. With him standing up and Kory sitting down the two were at the perfect level to interact with each other. Kory reached out to grab the large shaft. He began to pump it with both hands, tugging the thick foreskin along, much to the massive monkey’s delight. 

Stimulating the primate’s cock like this led to a thick bead of precum leaking out from the tip. Acting out of habit, Kory moved in to lick it up. As soon as he felt that soft tongue Rodney was compelled to act as well. He grabbed Kory’s head and shoved it down on his cock. The wild dog’s eyes bulged and he at first gagged around the huge amount of maleness. Rodney didn’t let up though and he moaned out from the strong pleasure he felt. It seemed his bigger cock was more sensitive. 

“Fuck…” Rodney couldn’t help himself. In addition to pushing his boyfriend’s head down, he began roughly thrusting into as well, shoving his large dick against the passage’s soft, warm, and wet walls. Rodney didn’t stop until all of it was inside and at that point there was a huge bulge in Kory’s throat. With it all inside the blue skinned monkey finally gave Kory the chance to adjust to his cock much larger size. Kory wasn’t sure how he was able to take it all but he could certainly feel it throbbing against his oral walls and there was a sudden heat and thickness from the precum that was leaking from the tip. 

When Rodney began thrusting again Kory was at least able to move his tongue and wrap his lips around the pistoning length somewhat but it was enough to make Rodney moan and his cock pulsed hard again, releasing a thick gush of precum that made the canine’s throat swell again. While he kept most of his cock in the throat, the primate was very much enjoying the tongue’s sweeps and twirls against his shaft’s underside. With more thrusts coming and more big gulps of precum to take, Kory was steadily adjusting and found that he was able to move more of his tongue and he even bobbed his head a bit against the cock’s pushes and pulls. 

“Ah...hah...ooh…!” Rodney surged his body forwards. Still having the cock in his mouth and throat, Kory was pulled along. Now laying on his back, the monkey was mounted over him on his hands and knees. Another push came, slamming all of the inches in. The monkey’s balls smacked into his chin before it was all pulled up again. Pushing in pulling back, the fat cock fed Kory more hearty loads of precum to drink while also plowing into his throat, reaching in as deeply as it could. Kory did his best to endure and breathe around the cock and his nose was filled with the raw scent of monkey musk, especially when the furless crotch was pressed directly to his nose. Rodney was panting hard, his hips rocking fast and hard. 

This treatment continued until Rodney slammed his cock into the hilt and kept it there. Kory groaned around the shaft, feeling it swelling and pulsing before the first wave of thick musky spunk was fired directly into his stomach. Kory didn’t need to swallow it as the force pumped the stuff right down into his gut. He couldn’t handle it all and some of it was gushing out of his mouth, oozing from the corners of his muzzle and down his chin. Kory did his best to still drink down the loads but they were coming out in such big amounts that it was a strain for him to keep up. Rodney was still panting when his orgasm ebbed out. Now he was sweaty too, having put more effort than expected into fucking Kory’s face. And yet he didn’t feel tired nor had his cock softened as it was tugged roughly from the canine’s throat and mouth. Kory was finally allowed to breathe freely and took in a deep breath of air that was laced with earthy, masculine musk. 

Rodney was ready to go again. He took hold of the wild dog before rolling the both of them over. The position was changed, with Kory on top and Rodney on the bottom. Despite that the monkey was still very much in control, especially since he had the canine positioned over his face. The moment Kory’s ass was pushed down he shoved his tongue into the tight tailhole and reached it far inside before he began swiping the even longer and thicker muscles along the anus’ walls, both stretching and wetting them. 

“R-Rodney! God..!” Kory was shouting out from the sudden filling of his ass and then the rimming brought intense waves of pleasure that overtook his senses. While the monkey held in his place and kept licking with such roughness, the canine’s long tongue was lolling from his muzzle. His ass was already feeling stretched and hot from the saliva that was smeared all over. The fat tongue popped out a few times and lapped all over the wild dog’s furry rear and balls, sending more intense shivers through Kory’s body. 

The intense rimming was just a prelude to what the monkey really had in mind. He lifted up Kory’s body again and when he eased it back down the wild dog’s ass was aligned with his freshly sucked cock. He pushed down and Kory exclaimed from his hole being filled and stretched even further. There was even a clearly seen bulge in his stomach when every inch was inside. While the monkey’s hands were holding onto him his lower half was already thrusting up and tugging back. Rodney bit his lip from the added tightness and heat of his boyfriend’s ass while Kory was panting even harder from the cock thickness rubbing against his anal walls. The pleasure they felt was intense but for different reasons. There was so much power behind the primate’s thrusts and Rodney was loving the persisting tightness that he moved his cock against. Just like before heavy amounts of precum were leaking out and it was further lubing Kory’s ass.

It wasn’t hard for the girth to touch his prostate and when that happened Kory’s hole would clench down on Rodney’s cock. This made the primate groan and thrust with even more power and speed. Kory was able to reach down and touch his own knotted cock so he gripped and stroked it, using his own precum to slide his hand back and forth. Doing their best to keep up with each other and enjoying the monkey’s larger body for their own reasons, the two basked in the intensifying pleasure and the also intensifying musk that was filling the bedroom. Both indulged in it, taking deep breaths of the monkey’s strong body odor. 

“Rrgh! G-gonna cum, Rod!” 

“Me too!” Rodney responded with heavy strain in his voice. 

Rodney thrust in hard again and hit Kory’s prostate along the way again. The wild dog was the first to cum, shooting ropes of cum onto Rodney's stomach and large pecs. The primate chuckled and then groaned as his cock swelled and released thick globs of cum that were making the canine’s stomach bulge and then inflate somewhat. Rodney kept his cock buried deep so that Kory could take every drop. When his climax came to an end he felt a rush of bliss and Kory was still panting hard with his stomach being noticeably rounder. 

“I’m not done with you yet!” Rodney said. He was again gripping his boyfriend’s body and rolling them both over. Kory was again on the bottom, lying on his inflated stomach and having his ass presented to the primate. Rodney wasted no time shoving his cock past the rim and thanks to the cum already inside he jammed the rest of it in with just a single thrust. As his balls smacked against Kory’s, he leaned forward and pressed his weight down on the canine, having his sweaty chest and stomach grinding against Kory’s back as he pumped his cock in hard and fast. 

“Oh fuck! R-Rodney…” Kory moaned. His body was being rocked from the force and he felt the tip poking so deep that it was making the skin and fur of his stomach stretch out around it. While they fucked so roughly, neither paid any mind to the other tenants in the apartment complex. They were both loud; moaning and panting hard. The connecting of their bodies was also easy to hear, expressed via hard smacks of Rodney slamming into the wild dog’s backside just before his balls would come swinging in with just as much force. 

Kory’s own cock was fully hard and leaking precum all over again. He had fully adjusted to the large amount of monkey dick in his tailhole and was loving every second of being pounded harder than he ever had been. Hot precum was being pumped into his already messy ass, increasing the sense of wetness and heat. The thrusting got faster and the smacks of Rodney’s balls against his own became more frequent. At this point the bed was being rocked along with them.

Keeping up this speed and roughness, the pair felt themselves getting close to their limits again. Rodney managed to go in even harder and Kory was all but screaming from the pleasure that came from this. His hole clenched down on the shaft with increased force and Rodney was grunting heavily, putting more weight down and rubbing his musky sweat even deeper into the spotted canine’s pelt. Kory was pushed over the edge first again like last time and shot ropes on his own bed. Right after came Rodney’s climax. The hard throbs were immediately followed by huge amounts of cum being spurt. Kory’s stomach was swelling even more from it. Those fat monkey balls had finally given all they could and Rodney was groaning with his tongue hanging out as the last fat jets of his spunk were deposited into his boyfriend’s guts. 

They were both left panting hard and remained still for a bit until Rodney pulled himself free and Kory groaned from the rush of cum that came out and the stretched feeling he was left with. 

“Told you that stuff was legit,” Rodney said with a satisfied grin. 

“Please tell me this isn’t permanent,” Kory groaned. The sex was amazing but he was sure that his hole would be left aching for a few days. 

“Nah, it's temporary,” Rodney explained. “But I think we should enjoy it while it lasts…”