---Disclaimer---
This story is entirely fictional and doesn't/shouldn't represent any real life situations. It is strictly for entertainment purposes.

Chapter 5. Switch Hitters.

Sonic slid his hips down taking Knuckles' cock into his tailhole. He let out a loud moan as the red echidna's tip rolled past his prostate.
"Fuck yeah Sonic," Knuckles grunted, "You're so tight!"
It had been 2 months since Sonic, Tails, Shadow, and Knuckles had their evening orgy, and the four of them wanted to spice things up a bit more. They decided that weekend to swap lovers, as they wanted to expand their sexual horizons. 

It was early that Friday night when Sonic suddenly bent over in front of Knuckles and presented his ass. After giving Sonic's tailhole a thorough licking, Knuckles sat back waiting for the blue hedgehog to climb onto his growing member. Sonic eagerly positioned himself over Knuckles and lowered his hips onto the flared echidna's cock. As soon as he dropped all the way down to Knuckles' hilt, Sonic pulled back up, bucking and twisting his hips. Knuckles moaned as Sonic slowly increased his speed, creating intense friction and pleasure between them. 
"You're so tight," Knuckles said, as Sonic pumped his hips up and down. 
Sonic said nothing, only smiling as he rode the red echidna's cock. His own dick flopped around leaking precum all over Knuckles' chest. Although he preferred the company of Tails, Sonic was quickly becoming addicted to the red echidna's cock. Taking it deep into his tailhole felt amazing, and he just couldn’t help but enjoy Knuckles’ flared cock head as it rolled back and forth inside himself. He was more of a switch when he and Tails would have sex, but the feeling of Knuckles' cock was incredible. The eight ridges on Knuckles' seven inch rod were pleasuring every part of Sonic's tailhole. As the ridges grinded against his prostate, Sonic would let out a primal grunt and his dick would twitch, shooting a stream of hot clear juice onto his partner. 

While not wanting to give up on Shadow, Knuckles couldn't help but think about how awesome Sonic's tailhole felt. It squeezed him in just the right places, and Sonic's skills in grinding his hips made it even better. There was a time when he would have been disgusted by the thought of fucking another guy's tailhole, but now it was all he thought about. Between Sonic and Shadow, he was completely addicted to fucking mobian hedgehogs. He not only wanted to cum into them as much as possible, but also to let them cum inside of himself. Engulfed in pleasure, the two of them panted as they reached their peak together. Knuckles knew he was close when Sonic had reached one hand down to their point of connection and accidentally slipped two fingers into Knuckles' slit. The sudden penetration sent waves of intense pleasure through his body. It had been a long time since Sonic experienced an anal orgasm, but Knuckles was making him feel so good it was inevitable. So much rubbing against his prostate…it was too much to bear. Sonic, now engulfed in the sensual pleasure of being simulated from inside, began spurting out his cum all over Knuckles. The blue hedgehog coated his friend's chest, head, arms...every square inch of him was hosed with his hot love juices. He just couldn't stop cumming as his insides were continually ravaged by his friend's cock. Meanwhile, Knuckles was at his limit as well. After being doused with Sonic's cum, he thrusted his hips up slamming against the blue hedgehog’s backside. His cock twitched, shooting his cum deep into his friend’s tailhole. Sonic moaned feeling Knuckles' thick love juices splash into his stomach. The red echidna grunted as he pumped Sonic's tailhole full of the white liquid. 8, 9, 10, 11...11 full spurts of cum coated every inch of Sonic's insides. It was so much that it began to leak out of his tailhole and down the sides of Knuckles' cock. When Knuckles had finished, Sonic collapsed forward onto the red echidna's chest squishing the cum between them.
"Damn, Knuckles," Sonic gasped, catching his breath. "You're amazing."
"Right back at ya, Sonic."

… … 

Meanwhile, Shadow and Tails were back in Shadow's basement playing games. Tails had bet him that if he could win 3 races in a row then he could be on top for the night. The two were silent as they concentrated on the game. It was the last race and Shadow had already lost twice. Although what Tails didn't know was that Shadow was throwing the races on purpose. He really wanted to see what the young fox was capable of in the bedroom, since both times they had previously had sex, it was Shadow who penetrated him. Knuckles had taken the young fox's knot previously, and spoke highly of the experience...so Shadow was eager to feel it too. 

"Yes!" Tails shouted as he crossed the finish line first. "That makes 3 Shadow."
Shadow sighed and leaned back onto his heels, "Yeah, I suppose it does." Tails quickly shut off the game system and TV, then sat close to Shadow snuggling under his right arm. 
"So are you ready to go now, or should we wait until later?" Shadow asked.
Tails said nothing, only smiled and removed his gloves, tossing them across the room. He was already just in his socks, as was Shadow. Tails wrapped his right arm around Shadow's waist, and reached over with his left and stroked the fluffy fur on the black hedgehog’s chest. Shadow closed his eyes and let the young fox rub him gently, as he removed his gloves as well. Slowly Tails worked lower and lower until he reached Shadow's pubic fur. He ran his fingers through the thick hair until he came across the black hedgehog's slit. 
"There it is," Tails whispered, rubbing two of his fingers across the slit. As the young fox rubbed, a bit of Shadow's juices began to flow out, lubricating Tails' fingers. "How's that feel Shadow," Tails said slyly. 
"Ah, yeah," Shadow muttered. He reached around Tails' back and gently caressed the fox's ass. "You're so soft. Why don't you put those digits into me?"
Tails giggled and did as he was told, jamming two fingers into Shadow's slit. He felt around inside of the hedgehog’s forbidden zone, searching for his thick cock. Shadow moaned, feeling the young fox's soft fingers coaxing out his shaft. 
"Oh yeah," Shadow said, feeling his dick grow as Tails pulled his fingers out of him, letting the black hedgehog’s cock harden out of his slit. Tails licked his lips as he gently grabbed Shadow's member. Though he had it inside of himself a few times, he hadn't gotten the chance to see it so close to his face before. 
"Your dick is so cool, Shadow!" Tails gasped running his fingers across Shadow's spines. "I wish mine had these nub things too."
"Don't sell yourself short, kid," Shadow replied, fingering the fox's sheathe with his left hand. "You've got a lot to be proud of yourself."
Tails giggled again as he stroked Shadow up and down. As they played with each other's dicks, Tails slowly shifted himself around until he was ready to straddle Shadow. Pulling the black hedgehog's hands off of himself, he jumped up to his knees aligning his young cock directly in front of Shadow's face. Tails was rock hard and his four inch canine dick twitched, leaking out  drops of his precum. "Suck it Shadow," Tails demanded, enjoying the feeling of dominance over the older male. 
"Don't mind if I do," Shadow replied, and opened his mouth wide, taking all four inches into his mouth at once. He clamped his muzzle down and gently sucked on the young fox's length. Tails moaned and placed both of his hands on Shadow's head. Shadow wasn't quite able to smile, but he was now very excited and satisfied with the young fox's actions. For some reason it really turned him on to be told what to do by someone as young as Tails. As he sucked and licked him, he wondered if he could get the fox to become accustomed to the dominance and do the same to Sonic as well. Something like revenge and reward at the same time. 
Shadow loved the taste of Tails. There was something intoxicating about sucking the undeveloped precum out of him. Shadow squeezed his mouth sucking the fox's little cock like a straw, forcing out the juices as fast as they could be produced. 
"Oh wow, Shadow!" Tails gasped, "That feels amazing!" Tails clenched his hands tightly on Shadow's head. Shadow in turn reached up with his right hand and tugged the fox's sheath back revealing the growing knot. He squeezed the swelling bulb which caused Tails to shoot out more precum into Shadow's mouth. Shadow was quick to suck it down, drinking every drop. With his other hand he began probing a finger at Tails' entrance. He moved it in circles tracing the young fox's tailhole. Tails gasped again, feeling the warmth of Shadow's hand caressing him. This pushed him over the edge and he tensed up for his orgasm. "Ah Shadow, I'm cumming." The young fox's toes curled as he pumped Shadow's mouth full of his thin boyish cum. Shadow hungrily gulped down every last drop, loving the taste of Tails' hot cum. His own dick twitched aching for attention, leaking out some precum of his own.
"Mmmmm," Shadow muttered, pulling his head back and letting the young fox's dick fall from his mouth. "That faker didn't tell me you tasted this good. He's lucky to have a lover like you."

Tails blushed catching his breath. "Turn...turn over Shadow. I'm not done with you yet."
Shadow smiled and got on his hands and knees raising his ass toward Tails. With his right hand he gently stroked himself, causing him to shoot a few spurts of precum onto the floor. Tails moved over to Shadow's hips and pressed the tip of his still rock hard erection against the black hedgehog's tailhole. "You ready, Shadow?" Tails asked.
"Hell yeah kid, give me all you got!"
Tails didn't need any other approval from the black hedgehog, and pushed his entire length inward. His stiff little cock was hugged tightly inside Shadow's tailhole. With Shadow tugging on his own dick, his hole involuntarily was clenching tight around the young fox. Tails moaned loudly as he pushed and pulled his dick inside Shadow's tailhole. He grinded his hips with each thrust pushing his knot right up against the opening. While Shadow certainly wanted to take the young fox's knot, he wasn't going to let him in that easily. He wanted to be sure Tails would get plenty of time to fuck him first. The black hedgehog was quite surprised how far into his ass the little fox could get. It was just barely close enough for the tip of Tails' cock to lightly nudge his prostate. He was also amazed at how thick Tails was. The four inch cock made up for its length with a surprising amount of girth for his age. With all the clenching Shadow was doing, it made for an intensely pleasurable experience. 
"Ah, Shadow!" Tails shouted. "You’re hot!"
"Cumming again already, kid?" Shadow was a little shocked, but he reminded himself that Tails was still young and likely doesn't have the same experience with delaying an orgasm. Shadow let go of his cock and loosened his tailhole. "Knot me you naughty fox!"
"Hell yeah!" Tails shouted, and buried his throbbing knot into the black hedgehog. The swollen bulb stretched Shadow further than he expected and far beyond what he had experienced with Knuckles. Gasping loudly the pleasure of being tied together with Sonic's young lover pushed him over the edge. Shadow let out a primal animalistic roar as he shot his load out onto the floor. There was so much that a puddle of his hot love juices quickly formed between his knees. Tails moaned and panted as he shot his thin cum into Shadow. The fox's young seed shot in deep, filling the black hedgehog with warmth. His knot swelled as he continuously shot spurt after spurt from his little dick. Shadow quickly lost count of how many times Tails had squirted. He was drunk with pleasure, being filled by the young fox. He was certain though, that it must have been Tails' largest load ever. Feeling the pressure building from all the cum inside of himself, Shadow couldn’t help but lose himself in that moment. It felt amazing, and he wished it could last forever, but eventually Tails slowed down. The fox stayed tied to Shadow even after finishing. His knot was tightly gripped by the black hedgehog's tailhole. Shadow didn't want him pulling out even if he could. 
"Oh man, Shadow. I've never cum that hard before," Tails said, panting and hugging Shadow from behind. "I don't think I'll be able to pull out for at least a half hour."
"Good," Shadow replied, clenching his tailhole around the fox's member. "We'll just rest here for a while then. Thanks for filling me up kid."
Tails giggled, then closed his eyes, falling out of consciousness and into relaxed bliss.

...

Meanwhile, back at Sonic's house. Knuckles and Sonic were scrubbing down their bodies in the shower anticipating the next round. The soap lathering between themselves foamed up heavily in their fur.  Gently, they rubbed each other's dicks to keep themselves hard. Sonic mostly rubbed the ridges on Knuckles’ cock head, while Knuckles mostly held the center of Sonic's shaft. They said nothing to each other, only lightly moaning as their lust for each other grew once again. Rinsing the soap off, Sonic spun around to turn off the water. As he did Knuckles squeezed the cheeks of the blue hedgehog's rear.
"Damn do I love this ass of yours," Knuckles said, breaking the silence. "Tails is sure lucky he gets to fuck it so often." 
Sonic turned around and placed one hand on Knuckles' chest, then leaned in kissing the red echidna. His tongue passed his friend's lips and he rolled his tongue around with Knuckles’. Parting the kiss, Sonic smiled again. "You're lucky he let you have your fun with me Knux. Though I'm sure Shadow is enjoying his little cock in your absence."
"He really is a horny little fox isn't he?"
"You're one to talk," Sonic replied, then kissed Knuckles again. "So what did you have in mind next?"
"I'm open for anything."
"Well then," Sonic trailed his fingers down until he was rubbing just above the echidna's slit. "How about I suck on that wonderful cock of yours?"
Knuckles hummed, "I like the sound of that. Where do you want me?" 
"Head down to the big chair in the living room. I'll be down in a few minutes.
Knuckles stared at him confused, "What are you planning?"
"You'll find out soon enough. Now get that sexy ass downstairs." Sonic slapped Knuckles back side shooing him out of the room. After he was sure Knuckles had gone, Sonic opened a small drawer below the sink and pulled out a butt plug he was hiding. He sucked on it briefly to lubricate it, then shoved it into his own tailhole. Reaching into the drawer he pulled out a second one and headed downstairs to where Knuckles was sitting. On the way down he sucked on the other plug, getting it wet. He wanted to shove it into Knuckles as soon as he could. 
As he approached Knuckles from behind he pulled the plug from his mouth. "Scoot back Knux," he said, crossing in front of the red echidna and holding up the dripping toy. Knuckles’ eyes widened before a satisfying grin cut across his face. He leaned back and lifted his hips just enough to expose his tailhole to Sonic. Without any hesitation, the blue hedgehog placed the plug at Knuckles' entrance and forced the whole thing inside. Knuckles let out a soft moan as his hole stretched to accommodate the toy. Clenching around it tightly, he let his hips back down and opened his legs wide giving Sonic a clear path to his cock. 
"Getting a little kinky tonight, huh Sonic?"
Sonic smiled, "Just want to keep you prepared for when I pump you full later."
"Can't wait," Knuckles chuckled. "Now were you going to suck me or what?"
Sonic shook his head and got on his knees in front of Knuckles. The red echidna’s dick was at full mast, twitching in anticipation. Sonic reached out with his bare right hand and gently grasped Knuckles at his base. He leaned his head in and licked just above his hand, trailing up the length. Knuckles let out a soft moan as Sonic reached the bottom of his head, and lapped at his cock’s flair. Trailing the 8 nubs on the edge of the red echidna’s head, he then moved up to the tip and opened his mouth wide. Lowering his head down Sonic closed his lips around Knuckles’ cock and gently sucked it. 
“Ah yeah!” Knuckles moaned. “Tails is such a lucky kid.” 
Sonic smiled, then moved his hand away from the base giving him more room to go deeper on the echidna’s shaft. He bobbed his head up and down slurping loudly on Knuckles’ seven inches. Sonic’s own dick throbbed, leaking his precum onto the floor. He was tempted to start stroking it, but he held off wanting to build up some natural lubrication before slamming it into Knuckles’ tailhole. Sonic pulled his head off the dick, then licked up and down the length of the shaft again. He pushed his head down toward Knuckles’ slit and licked right on its edge sending wild pleasures through the red echidna’s whole body. Once more Sonic licked up the shaft, around the head, and into his mouth sucking again. Knuckles’ breathing became more rapid and Sonic could tell he was getting close. Not wanting him to release just yet though, he decided to give him one more deep suck, before pulling out. He lowered his head as far down as he could, taking the long cock into his throat briefly. He had never tried that before, and it was a lot harder than it seemed. He then pulled back his head, letting Knuckles’ pulsing dick fall from his mouth. 
“Can’t have you getting off just yet,” Sonic said, standing up over him. His own dick twitched leaking out streams of precum which rolled down his 8 inches and pooled on his pubic fur. “Lift your legs up Knux. I can’t wait any longer.” 
Knuckles didn’t respond, he only panted coming back off of his near orgasm. 
“Hey Knux, did you hear me?” Sonic asked. Knuckles still didn’t respond. Frustrated, the blue hedgehog reached down and lifted Knuckles’ legs up and crossed them around his back. The red echidna gasped in surprise as his body was moved by another’s hands. “Hold your legs here Knux.” Sonic then reached down to the plug he had placed in the echidna’s tailhole earlier and quickly pulled it out.
“Aaagh!” Knuckles shouted as a long shot of precum escaped from his dick. “You bastard!”
Sonic said nothing, only smiled deviously and positioned his tip at the entrance of Knuckles’ tailhole, before it could close.”You might not be as tight as my little buddy, but you’re still pretty hot.” He said nothing more, and without warning shoved his entire length into Knuckles at once. 
"AGH!" Knuckles grunted. "Fuck yeah, Sonic!" The blue hedgehog then began thrusting in and out of the echidna's tailhole. 
He grinded his hips slightly each time, causing his dick to touch different parts of Knuckles' inner walls. While Knuckles was surprised he was being so rough with him, the pleasure was so intense that he didn't care. Tightening his legs around Sonic's body, Knuckles pulled him closer so he could thrust deeper. Sonic moaned as he held onto Knuckles' hips and increased the speed of his thrusts. "Yeah, that's it," Knuckles said, "Go as deep as you can!"
Sonic continued grinding his hips feeling Knuckles squeeze him tightly. What Knuckles didn't have in being super tight, he made up for with the way he flexed his lower muscles. He was able to essentially 'suck' on Sonic's cock with his hole, milking out the blue hedgehog's precum. "Knux! Keep it up! I'm gonna cum!"
"Do it Sonic! Fill me!"
Sonic's cock twitched as he thrust one final time into Knuckles. He groaned loudly,  shooting out his massive load into the red echidna's stomach. 6, 7, 8, 9, full squirts of his hot cum coated the depths of Knuckles' tailhole. The pressure building up inside of the red echidna pushed him over the edge and he clenched his tailhole tight releasing his own load of cum. Shooting up from his cock, Knuckles' cum splashed into Sonic's open mouth and on his chin. The two filled each other as their muscles tensed and bodies shivered.
After their climaxes tapered off, Sonic pulled out of Knuckles and collapsed forward onto his chest. Knuckles let his legs relax back onto the floor and he wrapped his arms around the blue hedgehog. The two were now completely satisfied and their lust was quenched. Looking at each other they chuckled.
"Tails is sure lucky to have you pounding his tailhole," Knuckles said. "You certainly know how to show a fellow mobian a good time."
"Thanks, Knux," Sonic replied. "You're not bad yourself…but I think I still prefer my little buddy over you."
Knuckles shrugged, "Yeah, I figured you'd say that. Thanks though."
"No problem," Sonic replied, rubbing the back of his head. He looked toward the side window of the room. "Hope he's doing ok without me, though."
Knuckles lightly punched Sonic's arm. "You worry too much. Besides, knowing Shadow, your little partner is bound to learn some tricks from him." Knuckles laughed thinking back to what Shadow had told him before the weekend. "Wouldn't surprise me if that kid got a little more confident after he's done with him."