Image imported from derpibooru 
Original Description:
 
Someone told this recruit aviator that plane ponies were kind-of like dogs… or perhaps cats… hey, maybe both, but in any case, he wanted to corroborate that himself, because it was so silly yet cute that it most likely wasn’t true, not to mention that the guy who told him that looked quite edgy himself…
 
“Hey Puppy” he said idly, looking upwards towards the massive plane pony almost on top of him, having to back up a little and crane his neck to do so.
 
“Yeah?” the alluded plane pony, more specifically a Sopwith Pup (Hence his nickname), replied, and almost instantly looked back and kneeled to make himself smaller for his micro friend, they looked rather adorable like that, both the micro pony and the macro pony.
 
“I… was going to ask you something…” he started, wondering, he kept on thinking how to articulate his question, when he finally gave up and decided to do something else. “I hope it’s not much to ask but… could you lie down for a second?” he asked.
 
“Oh? Well… for what exactly?” the plane pony asked confused “I mean, I can, but… why you need me to do so?” he continued, wondering what his friend wanted.
 
“Well… it’s a surprise, just lie down you silly, on your back” he said, giggling lightly and winking at him, a wink that left the plane pony even more confused, but he just shrugged and rose up to his full height, then, carefully (To avoid accidentally hitting his fellow tiny friend with his wings or tail) lied down on the soft grass, his head turned towards the micro friend.
 
“Okay, now… wait… I think I didn’t think this through…” the aviator said, idly wondering how he actually was going to reach the plane pony, he scratched his head a little, wondering, and then he had an idea. “Hey, could you give me a hoof please?” He asked towards the plane pony lying on peacefully.
 
“Oh! Sure, sorry” the plane pony said, meekly apologizing for not realizing what his friend wanted to do, and slowly put an upturned hoof near him, the fluffy frog pointing slightly upwards. The aviator giggled at his partner’s apologetic nature and climbed the hoof; it was somewhat easy to do so, since he had to learn this the hard way in boot camp. When he was completely on the soft and furry surface, he lied down on it, mostly because the plane pony shortly afterwards moved the hoof closer towards his chest, and standing meant having a higher center of mass, which meant that he could fall easily.
 
When the hoof reached his destination, the aviator smiled towards the plane pony, who idly wondered what he wanted to do, and jumped from the hoof towards the chest, the fluffy and rather soft surface helping him. Meanwhile, the plane pony giggled softly at how the aviator fell down the hoof in a not-so-graceful way, the micro pony feeling the Sopwith Pup’s chest move up and down as he giggled slightly.
 
The tiny aviator pony idly poked and brushed his hoof on the rather fluffy texture, being mesmerized by it, but afterwards he realized what he was going to do and kept on, walking the opposite direction of the head, or towards the hindhooves, the giant pony watching curiously what he was doing.
 
And, shortly afterwards he reached the spot he was looking for; he carefully prodded it a bit lightly, the plane pony reacting slightly, but nothing else. ‘Puppy’ didn’t get to actually realize what his friend was going to do before the latter suddenly put his four hooves firmly on his belly and started kneading and rubbing energetically with cat-like movements.
 
The Sopwith Pup almost immediately blushed red by the actions of the smaller pony and, feeling the little tiny pony rubbing his belly, he let out a little ‘Squee!’ and started to purr just like a kitten would do, squirming and wiggling slightly as his friend kept on the merciless bellyrubbing, he was actually enjoying this very much, even though he had never experienced this before, his enjoyment being punctuated sharply both by his purring, the content/happy expression on his face, his right hindhoof gently kicking and tapping the ground involuntarily, and his tail swashing from left to righ. He closed his eyes happily, the propeller on his nose cutely spinning a little in an involuntary reflex, just like the kicks he did with his hoof.
 
Meanwhile, his small friend smiled brightly, both because it he found out that it was real that plane ponies were indeed like cats or dogs, and also because he was making his friend quite happy with the belly rubbing he kept on doing. “Do you like this, huh?” The blue tiny pony teased lightly, keeping on his movements and kneading on top of the plone’s belly, gently rotating his hooves.
 
The plane pony didn’t reply, panting slightly and blushing, his orange-ish tongue out and a cute little fang showing in his happy smile, the blue tiny pony keeping on moving his hooves in circular motion on his belly, not giving the purring and squirming plane pony a moment of rest from his evil and merciless assault against the poor Pup.
 
After atleast 30 minutes of belly rubbing and purring, both the pilot micro pony and the larger plane pony were exhausted, the duo panting slightly as they looked at eachother and giggled. “T…th…that felt nice…” the Sopwith said, smiling towards the pony on his belly, the latter reciprocating the smile and just saying shyly “Heh… glad you liked it… Didn’t know plane ponies were… so pet-like”
 
The plane pony, still looking at him, winked at him shyly and said in a slightly teasing tone “Well… I’ll show you another thing we’re quite pet-like…”, then, immediately after finishing that sentence, he motioned his front hooves towards him, the aviator didn’t know what was going on before he was gently picked up by both underhooves and carried towards the fluffy plane pony’s chest, the Sopwith gently dropping his friend on his soft chest and almost immediately placing both front hooves on top of him, gently pressing him under the frogs and against his chest in a loving hug, purring lightly as he kept on snuggling and cuddling with his friend, gently moving his hooves on top of him like a petting. “We… err… like cuddling” he noted, just in case the aviator didn’t realize what he meant, smiling shyly and purring.
 
The aviator, meanwhile, was lying down on the plane pony’s chest, the hooves pressing him slightly, he smiled, feeling his chest fluff, and just yawned slightly, afterwards saying “Well… then whoever told me you plones are cute was damn right…”, and just let himself fall asleep on his friend’s chest, the later also doing the same after a while… such a cute picture; both plane pony and aviator sleeping peacefully and cuddling…
 

 
A little drawing I did of the Sopwith Pup (Yes, it was indeed called Pup, but technically the original name was ‘Scout’), receiving belly rubs, because of course, when you’re named Pup, someone’s gotta rub your belly, right? :P. In any case, just wanted to make this plane pony… err… behave like a dog or a cat, depending on your interpretation (Tip: Chose the cutest one :3)
 
The rather lack of coloring on the plane pony’s is because the reference I used showed the entire underside of the aircraft in a cream/beige colour, aside of the roundels and the black engine of course. And the curved tail is because a friend recommended that it would be cuter that way. The pose of the plane pony itself is because I researched extensively about pony belly rubbing and it looks cute like that xD.
 
In case it looks odd, the little tiny pony is wearing a helmet, a British one of WW1. Hence why his head is of different colour and ‘strange’. Also, the thing above the propeller is a machine gun, a Vickers one, used in the original and real life Sopwith Pup; I wanted to make that little historical detail too.
 
Fluffy macro plane ponies for the win folks!