Gassy Tails
Ch. 3: Pumping Iron
"Okay, Tails. You can do this. It's for Cosmo." Tails said. He was staring at the glass before him and had been struggling to drink its contents for 10 minutes. In his defense, it was a glass filled with 4 raw eggs, not a delightful drink by any means. He decided to finally bite the bullet and chugged down the eggs as best he could. "BLEEEGH!!! How do people drink that stuff?"
Tails wiped the egg residue off his chin. It may have been the most disgusting thing he had ever tasted, but he knew he needed the protein for what he was about to do. He sent a quick text to Cosmo before he picked up his bag and headed for the door. He passed by the living room where Sonic was busy playing video games.
"Okay, Sonic. I'll be back later. Try not to burn the house down." Tails said, jokingly.
"Yeah, yeah. I heard ya the first...Pfff What are you wearing?" Sonic asked through his laughter as he saw his fox friend’s attire. Currently, Tails was wearing a skintight blue wrestling singlet with yellow trim.
"What? It’s a singlet. I'm going to the gym." Tails said, as if it was an everyday occurrence that the normally nerdy fox went to the gym. "Gotta work on my guns." As if to make his point, Tails started flexing his arms. He had turned around and unintentionally gave Sonic a view of his butt. Sonic blushed lightly when he saw it. Tails already had a bubble butt, but the singlet made it way more pronounced. Luckily Sonic focused on what Tails said so he wouldn't be too distracted.
"And this has nothing to do with that little incident you had on your date with Cosmo?" Sonic asked bluntly.
"N-No." Tails said, trying and failing to lie. 
"Oh Tails. I already told you, things are fine between you and her. There's no reason to go overboard." Sonic said.
"I know, it’s just...I wanna be sure. Ya know." Tails said, rubbing one arm nervously. 
"Okay. I know I can't stop you when you set your mind with something. Just be careful, and I'll be sure to have an ice-bath ready when you get back." Sonic said, giving Tails a good luck hug. 
"Thanks, Sonic." Tails said as he returned the hug. He then picked up his bag and went out the door.
"And say hi to Cosmo for me!" Sonic called to his foxy friend.
It didn't take long for Tails to get to the gym. He had already researched the closest one, which happened to be a stone’s throw away from where he lived. However, when he walked inside it was hard for the fox not to feel intimidated. The place was packed with hulking beasts that looked like they could lift a car with minimal effort. Among the seas of bodybuilders was Knuckles the Echidna. While Tails didn't notice him, Knuckles caught sight of the fox, if only for how out of place the little yellow guy looked. Knuckles wanted to say hi, but he needed to get his reps in first. He figured there was plenty of time for pleasantries, especially since it looked like Tails was just starting his workout by going into the yoga studio.
*Okay, Tails. This place is a little scary, but yoga is a nice neutral place to begin. After all, stretching is very important when working out.* Tails thought to himself as he walked into the yoga studio. He may have been surrounded by girls, but at least he felt more comfortable. The fox sat on one of the spare mats of the studio as the instructor spoke.
"Okay everyone. Let's go ahead and start with a nice downward dog position." The monkey leading the class instructed. 
Tails followed the instructor’s movements and got on all fours with his backside raised high into the air. It felt more than a little awkward to the fox since the singlet was riding up his crack something fierce. He just hoped everyone was keeping their heads down like him and wouldn't notice. Luckily, the instructors voice distracted Tails from his embarrassed thoughts. 
"Alright, now let's all take a relaxing deep breath." The instructor said. 
Tails closed his eyes as he did what he was told. One big breath in through the nose. And one great, relaxing exhale through the-
*Pppppppppsssssssssrrrrrrtttt*
Tails's eyes shot opened at the sound. Did that just happen? Did he really just-? Tails then heard a few small giggles all around the room, confirming that he wasn't the only one that heard his little outburst. A light blush appeared on Tails's face as he started to get nervous.
"Now, now. That is a perfectly natural response to relaxation. Let's do another deep breath" The instructor said. The class calmed down enough to do the exercise, but when the next exhale came they were interrupted again.
*pppppppppppppppppPPPPPPPPPPPRRRRRRRRRTTTTTT*
Tails's face grew hot since that one was much longer and louder than the last. He prayed that, by some miracle, nobody noticed. Sadly, the fox wasn't that luckily, since a very strong eggy scent started making its way across the room.
"Geez, pipsqueak! You really need to change your diet!" Tails heard someone say out loud. This caused the whole class to erupt in a mix of laughter and coughing. The fox stood up and saw everyone waving a paw in front of their faces.
"S-Sorry." Tails announced, before running out of the room as fast as he could. Unbeknownst to the fox, Knuckles had watched the whole scene through the glass wall of the studio. A smirk grew on the Echidna's face. Knuckles followed Tails's direction until he found the fox at a water fountain far from the yoga studio.
*Enough stretching, it’s time to get serious.* Tails thought. He was trying his hardest to forget what just happened. Looking around, Tails saw a group of people doing sit ups. It was a much smaller group than the yoga class and they looked to be spread out more. Tails confidently walked up to a trainer that was watching the sit ups.
"Woah there, Champ. The wrestling school is down the street." The Ox trainer said when he saw Tails. 
"A-Actually, I was hoping you be my spotter for sit ups?" Tails asked, timidly.
"Oh, Sure thing, small fry." The Ox said, chuckling. He led the fox to a good spot and told him to lay down. When Tails got in position, the trainer got on his knees and held down the fox's feet.
"Okay, ready?" The trainer asked. Tails nodded. "Okay, Go!"
Tails laced his hands behind his head and tried his hardest to lift his upper body. It was really tough because his pudgy tummy had a hard time flexing. On top of that, the trainer was shouting his usually brand of encouragement and it motivated Tails to try as hard as he could. This was the first step to getting abs after all, and abs were the perfect way to win Cosmo back. 
He had!
To give it!
His all!
With one more push Tails tummy curled as he completed his first push up...but at a price.
*PPPPPPPPPPPRRRRRRRTTTTTTTTTT*
Tails opened his eyes in to to see the trainer fall back in disgust. A twitch of his nose told Tails all he needed to know. Not only that, but the fox could swear he saw the faintest remnants of a yellow cloud. Tails quickly got to his feet and offered an apology.
"I'm so sorry." Tails said, before turning tails and leaving the area. In his rush, Tails still didn't see Knuckles who sat in a sit up position a few feet away to watch the show. He waited a minute before getting up to follow the fox.
*Who needs Trainers? Most people work out by themselves anyways.* Tails thought. This gym trip wasn't turning out the way he thought it would, but still had hoped things would get better. He just needed to find a good solo exercise.
"Perfect!" Tails said when he saw a pull up bar that was high off the ground. He flew up and grabbed the bar when he realized something. 
"Hmm, Maybe I shouldn't use my tails for this." Tails said. He promptly stopped spinning his tails and hung there as his grip tightened around the bar. "Okay, here we go." 
Tails could feel the full force of gravity working against him as he struggled to lift with just his arms. He even kicked his legs wildly trying to gain any advantage he could. Through all the exertion, Tails could also feel the slightest bit of tention in his tummy. However he quickly ignored it when he felt his arms bend, as he was surprisingly making progress. Tails was now eye level with the bar. He just needed a lttle more force, but strangely his tummy felt like it was weighing him down. 
"Come on...I'm so close!" Tails said as he continued to strain. His mind flashed to images of Cosmo swooning over his newly muscular body. It was so perfect. He needed to do this for Cosmo. "Almost...There!"
*PPPPPPPPPPPPPPPPPPPPPPPPRRRRRRRRRRRRRRRRRRRTTTTTTTTTTTT*
"Aaaaaaaaaaaahhhhhhh!" Tails gave a big sigh of relief as he finally completed the pull up. The weight in his tummy evaporated and he felt as light as a feather. It took a second for Tails to realize what he had done as the smell of rotten eggs covered his whole body. One sniff and Tails knew he needed a shower before doing anything else. 
Knuckles secretly sat right behind Tails, where he had been since Tails first gripped the pull up bar. Anyone who walked by would think the echidna was just taking a break between reps, but in reality, Knuckles had witnessed Tails crop dust the area he was sitting in. That moan the fox gave was music to the echidna's ears. He covered his mouth with a towel so he wouldn't blow his cover with a stray cough, but the towel did little to shield him from the rotten egg smell. When he saw Tails jump down and head toward the locker room, Knuckles figured it was time he and the fox had a little chat.
*20 Minutes Later*
Tails turned off the shower feeling way more refreshed. It took some serious scrubbing, but he had finally gotten the rotten egg smell out of his fur. After a quick trip to the fur-dryer, he grabbed a towel to dab at more damp areas of his body. Since mobians didn't usually wear clothes, he was content to drape the towel over his shoulder as he headed toward the lockers. Not that he had to worry about modesty since he the locker room was empty the entire time he'd been in there...or so he thought.
"Hey there, Tails!" Knuckles said as he placed his arm in front of the fox so he could lean against the wall. He saw Tails flinch a little, which wasn't surprising since Knuckle's intentionally startled him.
"Oh uh...Hey, Knuckle's. What are you doing here?" Tails asked. Even though the echidna had startled him, Tails was happy to see a familiar face.
"Hehe, isn't it obvious. I'm working out just like you. I woulda said hi earlier, but you looked like you were in your own little world." Knuckles said. 
"You've...been watching me work out?" Tails asked. Now the fox was getting nervous thinking about what Knuckles had seen him do.
"Yeah. In fact, I had a question for ya." Knuckles made sure to throw in a pause before asking his question. He just loved watching the fox fidget with his paws and waited a good 30 seconds before continuing. "Have you been feeling gassy, today?" 
"WHAT?!...I-I mean of course not. Why would you ask such a thing?" Tails said. However, anyone with half a brain could tell the fox was lying, especially with beads of sweat starting to form on his recently dried head fur. 
"Oh, come on. I saw what you did to that yoga studio, Hehe, I think they're still trying to air it out." Knuckles said with a smile. He was loving every minute of this, watching Tails try frantically to deny the actions of his tight butt. 
"No! I didn't me too...That wasn't-" Tails racked his brain to think of any excuse he could. However, it was at that moment, his body chose to betray him. 
*GGGGGGrrrrrrrrrrlllllll*
"Uh...What was that?" Knuckles asked, even though he was close enough to know the answer.
"Nothing." Tails said quickly. A clear blush spreading across his face.
"Well, it sounded like your tummy was calling you a liar." Knuckles said matter-of-factly. He took a few steps closer as he continued. "What's the matter, Tails? Do you need to make a stink?"
"N-No." Tails said as he backed up ever so slightly.
*GGGGGGGGGGRRRRRLLLLL*
"Oh but, listen to your poor tummy. Keeping in all that pressure can't feel good, right?" Knuckles asked as he continued backing Tails in a corner.
"Yeah." Tails admitted. Knuckles had a point, and his words were having a strange effect on his body's defenses. Tails could feel his bowels starting to loosen.
*GGGGGGrrrrrLLLLLL*
"Wouldn't it feel so much better to just...let it out?" Knuckles asked. By this point his tone was low and intimate.
"Yes...But..." Tails offered as a last-ditch effort to hold it in, even as he felt his rump come in contact with the moist tiled wall.
"Or maybe...You just need a little help." With that last word Knuckles placed a paw on Tails's tummy and gave it a little push.
"NGH!"
*BBBBBBBBBBBBBBBBBBBBBBBPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPRRRRRRRRRRRRRRRRRRRRRRTTTTTTTTTTTTTT*
The acoustics of the shower room may have amplified the sound some, but even without them the explosion was loud. However, Knuckles was more focused on Tails's reaction. The fox's face was in state of confusion and pleasure. He was humiliated by Knuckles's actions, but at the same, the echidna's touch had felt so good to him. No one had ever touched his tummy like that before and it had made him feel things he'd have never thought possible. It just felt so darn soothing. 
"That's what I thought." Knuckles whispered into Tails's ear. In response the fox bolted over to his gym clothes, leaving Knuckles to smirk as he headed toward the fur dryer. The Echidna didn't even mind the eggy stench that had consumed the room at this point. He was satisfied, nonetheless.
Tails got dressed as fast as he could and left the locker room. Anyone else would've called it a very humiliating day and headed home, but Tails was so flustered by what he'd just experienced, that he chose to work out some more so he could clear his head. The fox decided to do some good old-fashioned weightlifting and had sat down on a weight bench. However, just as he was about to lift the barbell, Knuckle's face popped up in front of him. 
"Hey, pal. You forgot to say 'Excuse me' back there. Knuckles said, still smiling.
"Why did you follow me, Knuckles?" Tails said, His tone was sterner than it had been all day. 
"Oh, Well I figured you could use a spotter." Knuckles said as he walked over to Tails's side. "After all, you did skunk your last one." 
That comment caused Tails's face to go full blown red but, he couldn't exactly say no to the echidna. Spotters were important when it came to the safety of weight training, he had seen plenty of internet videos to prove that. So, Tails begrudgingly accepted Knuckles's offer.
"Whatever, just get over here so we can start." Tails said. At this point he was embarrassed beyond belief. 
"I think I'm right where I need to be." Knuckles said as he got down on his knees. He put both paws on Tails's midsection, which instantly stunned and surprised the fox. Knuckles then layed his head on Tails's tummy and was met with the sounds of loud gurgles.
"What are you-? Oooooh!" Tails moaned.
"Shhh, your tummy sounds so angry... I bet I could make it feel good again." As soon as the words left his lips, Knuckles began massaging Tails's tummy. 
Tails couldn't help but moan as Knuckles went to work on his middle. The fox had never expected the usually gruff and tough echidna to have such magic fingers. Knuckles seemed to press every sensitive area Tails had.  The fox's tummy hadn't felt this good in a long time and it didn't take long for another part of his body to respond to what Knuckles was doing.
*PRRTT*
*BRRRRRPPPPTTTT*
*PPPPPPPPPPPPPPRRRRRRRRRRRTTTTTTTTTTTTT*
"Now, we're getting somewhere." Knuckles said as he continued. He could tell Tails was enjoying this by his near constant moans and his blushing face. Another good sign was the twitching bulge in Tails's singlet.
*PPPPPPPPPPPPRRRRRRRRRTTTTTT*
*FFFFFFFFFFRRRRRRRRRRRRTTTTTTTTT*
*PPPPPPPPPFFFFFFFFFFFFFRRRRTTT*
*Prrrrrrrpppppprrrrttttttt*
"Man, you really had a lot in the tank." Knuckles said quietly. He was just about done with his fun...until he heard it.
*GGGGGGGGGGGGGGRRRRRRRRRRRRRRRRRRRRLLLLLLLLLLLL*
The gurgle was so loud that Knuckles felt it shake Tails's tummy. He lifted his head up and cracked his knuckles. He knew just what he needed to do to unleash such a beast and once his hands were in position, Knuckles pushed all his weight onto Tails's tummy. The fox bit his lip as all the air was forced out of him.
*BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFRRRRRRRRRRRRRRRRRRRRRPPPPPPPPPPPPPPPPPPPPPPPPPPPFFFFFFFFFFFFFFFFFFFFFRRRRRRRRRRRRRTTTTTTTTTTTTTTTTTTTTTTTTTT*
"Haaaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhh!......That was amazing." Tails said as he tried to regain his breathe. All the stress and misery he had gone though was washed away as he basked in the afterglow of what Knuckles had done for him. He would've been content to lay on the bench for a little longer, but then heard a voice.
"Um...Tails?" 
Tails's eyes fluttered open only to see Cosmo standing over him with a dark green blush on her face. Instantly, the relaxation Tails had felt moments ago was replaced by a feeling of embarrassment that had increased a thousand-fold. His face went red as he totally froze, unable to process what Cosmo had seen him do again. He couldn't deny it either, since the smell of bad eggs hadn't wafted away yet.
"I got your text." Cosmo said after a long pause. In response, Tails gave a bashful smile, knowing he was gonna have his work cut out for he when he explained this to Sonic later.