Water to the Lava, Sparking Fires
This is Dragon Lands, Remember?
It had been a while since Spike had visited Dragon Lands. Princess Twilight was having a meeting with Dragon Lord Ember and he was given some time-off, which he decided to use to go chat with Smolder. Being born in Dragon Lands and having a brother there she visited the place quite often, so he was sure to meet her somewhere. It didn’t take long for him to find her, just like he thought.
“Oh, hi Spike!” Smolder greeted her friend when she saw him coming, “How’s the life at the palace?”
“Well, I do have my duties.” Spike replied and smiled, “How about you?”
“Nothing special,” Smolder stretched her arms and kicked a pebble in front of her, “Been teaching at Friendship School. I love the place but sometimes… I need to return here to catch some breath.”
“You mean…” Spike was a little confused, “You came HERE to catch some breath? Is it that hectic there?”
“Hey, we’re dragons!” Smolder poked Spikes nose with her finger, “This place is supposed to be our home!”
“I guess so!” Spike hoped he didn’t hurt Smolder’s feeling with his comment. He had been raised among ponies and didn’t miss the culture of his kind, but he didn’t want to offend any of them.
“No big deal, Spike!” Smolder reassured, “Let’s go somewhere else! I wanna show you something!”
And so, they both spread their wings and took off to the sky. After chatting for a while during their flight, they decided to land by the lava pond below. Spike could see a huge waterfall of lava spouting molten rock to the pond and how the air was filled with steam and hot fumes coming from the magma. Spike had to admit the place they had come was way too dangerous for ponies, he himself wasn’t affected thanks to his thick scales.
“This place is kinda cool,” he said to Smolder, confused at first when she suddenly begun to laugh as if he had said something funny.
“I came here often when I was a kid,” Smolder told him after she had stopped chuckling, “Me and Gar-Gar used to play here many times.”
“Where’s Garble, by the way?” Spike noticed Smolder’s big brother hadn’t been around like he always did when he visited Dragon Lands.
“Well, he wanted to publish his poems and write a book,” Smolder shrugged, “But since he can't write, he went to school. He’s been there for a while.”
“That’s great, Smolder!” Spike was happy for Garble to find his calling. After all, it meant he wouldn’t be picking on him anymore. Years ago, Garble used to call him a baby, and while he had had one of his many growth spurts, his body type was still pretty slim; his frame was skinny and he didn’t have much muscles yet, apart from his pecs and tight abs. He used to wish to be bulkier so he wouldn’t be bullied ever again, but he had learned to accept himself the way he was. Although it wouldn’t hurt to be more chad, wouldn't it?
Suddenly Spike felt something drastic: he hadn’t used bathroom for a while and now his bladder was aching as it was full to the brim. He was a little embarrassed to excuse himself.
“I gotta take a leak.” Spike said timidly while scratching his neck, “You’ve got toilets somewhere?”
“What?” Smolder chuckled, “This is Dragon Lands, remember. This WHOLE PLACE is your toilet!”
“I guess so…” Spike shook his head, figures they still didn’t have such facilities in Dragon Lands! He looked around the area, searching for a big enough boulder that could provide him some cover to go and relieve himself.
“Okay, I guess I should- Wait, what are you doing?”
Spike noticed Smolder was lowering herself to the squatting position, swishing her tail aside.
“To be honest, Spike… I need to pee too!” Smolder blushed while squatting on the ground.
Before Spike could say anything to protest, he saw something he had never imagined happening to him:
Smolder kept her legs apart as if she was purposely showing Spike her crotch. And especially her white draconic vulva hovering a foot above the ground. She let out a sigh and a tiny arc of golden urine surged from between her lips, trickling on the ground and breaking into the tiniest droplets, before increasing in volume. A puddle started to form under Smolder’s feet and soon the air was filled with an acrid stench.
Spike couldn’t help but watch her. He wasn’t sure why such display was making him so aroused, although he did admire Smolder’s slender body and her curved hips. He was quite surprised his friend was so willing to show him her genitals.
He felt his priced draconic penis starting to slip out from his slit, to his horror. He needed put his hands on his crotch to block the view, hoping Smolder hadn’t seen anything. It seemed too late, however, as Spike could see his friend smirking and open her mouth;
“You like this, don’t you?” Smolder said teasingly, swaying her hips a little to get Spike’s attention.
“W-well… It eh… looks nice…” Spike replied as the blush formed in his cheeks, “I mean- That’s… kinda hot-“
“Well, how about this?” Smolder moved her hand down to her crotch and spread her lips apart, flashing Spike her inner labia and more of her pink insides as her stream kept gushing out from her urethra. That immediately took Spike’s full attention, his eyes shooting open to feast on the all-new details of her vagina.
Smolder seemed to enjoy what she was doing. She really loved the attention she got from her friend and wanted to tease him just a little more, knowing he would like it. After some time, her stream slowed down and then stopped almost completely, only a couple of drops were dripping from her pee-hole to the large puddle she had created. Even though she had already finished peeing, she kept holding herself open for a while, allowing Spike to see her pink inner walls a little longer.
Spike was so mesmerized by the show he couldn’t let out a word, his penis throbbing against his palms. It was starting to hurt as his hands were bending his cock backwards, but he didn’t dare to take them away.
Finally, Smolder decided to move on. She sighed softly and tried to push the last squirts out of her snatch, but suddenly something really awkward happened:
She managed to let out couple of loud farts, taking Spike completely by surprise!
“Oops!” Smolder said with an embarrassed grin, “Didn’t see that coming!”
Spike’s nostrils flared.
“And I thought only guy dragons let out such deadly farts!” he replied, seemingly disgusted, “Whew, it reeks!”
“Shut up, Spike!” Smolder blushed as she let go of her lips and rose up from the ground. ”It’s OK to fart here!”
She shook her other leg to get some last lingering droplets off her vag, making Spike a little worried.
“Do you… Need some paper for- Oh!” Spike was as he saw Smolder wiping herself with her fingers. She flicked her fingers dry and turned towards her aroused friend who was covering his crotch with his hands.
“Man, that felt nice!” She purred and walked towards Spike, pointing at his crotch, “So you DID like it, huh?”
“Um, yeah!” Spike blurted, still trying to hide his boner. “Th-thanks for letting me see that!”
“D’aww, no worries little guy!” Smolder reassured and slapped her hand on Spike’s shoulder, “Been doing public ones before, no big deal. Just return me the favor sometimes!”
“Hah! You bet!” Spike chuckled and looked around for a place to drain his tank, “Just wait a moment so I-“
Words got stuck in Spike’s throat as he suddenly realized what Smolder had meant. He turned his face back to his friend to meet her eyes.
“Oh, you mean… Like...?” he asked to confirm his doubts.
Smolder smirked and nodded, making Spike’s face go pale: she wanted to watch him to pee right now!
Spike hesitated for a moment. He didn’t have any problems peeing in the male company, having shared the bathroom with Shining Armor many times, but this was completely new. While he wasn’t sure if any female creature he knew had ever seen him urinate before, apart from maybe Twilight and her mother as they were part of his family, he had never had a partner who was willing to watch him doing it. Nevertheless, he was still going to try his best.
“Ok, fine…” Spike reluctantly moved his claws out of the way of his expanded, spear-headed dragon dong that sprung up in an instant, making Smolder raise her eyebrows in awe. It was 10 inches in length, red in color and the shaft was covered with little barbs all over it. It was arcing upwards and it had a thick knot at its root. Spike grabbed it in his claws and started aiming himself at the ground.
“Nuh-uh, big boy!” Smolder cut his actions short, “I wanna watch you piss into that pond!”
Spike didn’t say anything as he quickly turned to his left and took a couple of steps towards the pond. Smolder followed suite and lowered herself to eye her friend’s penis from a shorter distance as Spike was trying to steady his aim once more. For her, this wasn’t the first time seeing a male dragon doing something like that, as dragons were used to doing their business where they wanted. She had also been around all those times when Garble was having challenge pissing with his friends, she had no shortage of dragon sausage in her life!
But this was completely new to her. It was her crush, of all creatures, that was doing it, solely to her – for her. This fact only added the intimacy of the moment and she started to feel wet in her nethers. Her eyes traced over Spike’s slim, almost feminine-looking dragon body, his abs, hips and curvy buttocks, then returning her gaze back to his cock he was holding between his fingers. She really admired his body; he was different from Garble or other male dragons she had seen, not such a beefcake as they were. Damn, he was so hot!
“Gotta admit, Spike!” Smolder chirped and crossed her legs, “You never told me you were packing that much!”
“Hah, thanks!” Spike was pleased with her compliments. While aiming himself to the molten lava, he whistled one of Pinkie’s cupcake songs and looked up to the sky as he tried to relax, which was little difficult knowing his friend was staring at him. He gave one last look at Smolder who had her eyes locked on his junk, waiting for the magic happen.
“I’m doing this for Smolder!” He declared in his mind and after a minute he finally managed to force his stream through his erection. It started slow at first, soon forming a heavy stream that sizzled audibly while it touched the surface of the magma, evaporating into steam.
It took all of Smolder’s attention and she grinned at the sight, blush forming on her cheeks. Spike was now completely exposed in front of her, holding his most valuable asset as it spurted urine into the lava pond. She felt her petite pussy swelling and seeping out her juices that soon trailed down her thigh.
“Man, this feels good!” Spiked sighed and relaxed. He started subconsciously moving his cock from side to side as he kept hosing the lava, his piss instantly turning into steam by contact with it. He had never even thought what would happen if he peed into the volcano!
“Damn Spike! How much did you drink?” Smolder quipped while blushing. Spike could see her hand trailing down between her legs, knowing very well what she was about to do.
“No more than you did!” Spike snorted as the reply and turned his eyes back into his stream. From the corner of his eye, he could see Smolder starting to masturbate, pushing her middle finger inside her vaginal cavity while her index finger trailed around her engorged clit. He could hear some soft moans coming from her direction, but he didn’t look away from the target he was aiming himself at.
Minutes later Spike felt himself getting fully empty. His stream slowed down to a trickle and he flexed the last squirts out of his junk. He gave his cock a few shakes to get the remaining drops off, then letting go of it to let it stick out on a full display while he leaned backwards and sighed in relief. He had to admit to himself that deep down he had liking for this kind of thing.
“That was fucking hot, Spike!” Smolder huffed as she pulled her soaked fingers out of her pussy, pulling along a thick string of pussy juice. “You’ve got nice cock, you know!”
“Um… Thanks!” Spike blushed as he turned towards Smolder, waiting for his erection to die down. “Must run in the family-!”
Spike couldn’t finish his reply when Smolder leaned against him and gave him a sudden open mouth kiss, taking him by surprise. He jumped at first, but soon relaxed and returned the kiss, swirling his tongue with Smolder’s. He could feel Smolder’s hand trail down his chest and belly, soon grabbing his penis and starting to stroke it gently.
“Oh, Smolder!” Spike moaned into his friend’s mouth as they kept kissing. He couldn’t think straight as he felt his junk massaged in Smolder’s gentle grasp, sinking deeper and deeper into the euphoria.
Suddenly their intimate moment was halted when Spike let out a long and somewhat melodic fart that changed its tune at least three times, making Smolder jolt in surprise.
“Spike!” she broke their kiss, trying her best to fight back the laughter. She let go of Spike’s cock, making him wake up from his ecstasy and open his eyes.
“What?” Spike blinked couple of times and played along, “We’re dragons, remember? I thought it was okay to fart!”
-THE END-
Author's Note
This story was requested by a fan who wished to be anonymous. They provided me a topic I was interested to try out and while this was supposed to be just a short character one-shot, I got excited while writing and managed to stretch 1000+ words more out of the idea. Consider this as a bonus! 
I personally like this ship a lot, but had never written anything based on it. I also guess people prefer Spike to be slim, even though his chad version is in accordance with his day dreaming from earlier seasons. 