This is their kids? I thought it was a genderbent Spike falling for Garble at first glance. Whichever, the dragon-girl is cute.

…Now flick your tongue a little bit.
 
WHAT? DON’T LOOK AT ME LIKE THAT! I HAVE YET TO SEE SOMEONE UTILIZE A  
DRAGON’S FORKED TONGUE FOR SMOOCHES!

If I wasn’t busy writing spike fics I’ll write this myself.

@Sjogre  
They’d never do that since I’m pretty sure they find the relationship cute. Plus, it’s too big of a character development between the two and there’s lots of room for comedy/sweet moments.

@Itsthinking  
I’d be disappointed if they had any kind of lesson that said he’d have to stick to his own species.
 
While I’m okay with Sparity, I think that I’d like it if he started dating someone that he had to go out of his way to meet. Someone that he had to put effort into pursuing, rather than just hanging around town.

But really: who knows where they’ll take Spike’s romantic interests? Depends on what they want the story to be like.

@Sjogre  
Even the people behind the show have joked about Spike being in a relationship with a pony causing an uproar in Equestria. I really don’t think it matters as long as there are hooves, but Equestrians seem to be fine with physically strange creatures as long as they make an attempt to play by their rules.
 
Who would object to a dragon raised entirely in a pony society from birth wanting to marry a pony? He wouldn’t be a threat, and they’d be denying him something that he was taught to feel.

@Itsthinking  
Hmmn. We know that donkey/pony relationships exist in Equestria. After that, who knows?

@QueenCold  
I sadly think it’s realistic. Equestria’s not supposed to be a utopia.

@QueenCold  
So many questions, so much stuff to think about. I really can’t see him liking anything other than mares at this point simply because he’s grown up around none of his own species, but I guess it could change?
 
@Background Pony Number 17  
I’d kind of agree with this as the primary reason he’d never really find a dragonness appealing, unless she somehow found him intriguing or something.

@QueenCold  
I’m still waiting for a fic that has some dragoness abduct Spike to force him to be her mate. Keep him trapped in some cave/dungeon until his hormones turn into overdrive. And poor Spike trying desperately to retain his sanity, while Twilight and friends tear up the countryside looking for him.

@Background Pony Number 17  
It’s quite rare to come across a 1980’s version of something that is less racist than the contemporary version, but MLP is one of those things.

@Itsthinking  
A Qilin is an actual thing from Chinese mythology. It has a load of different depictions, but that’s pretty normal for any mythological creature.

I’m pretty sure that the FIM writers intend for dragons in Equestria to be heartless brutes. Spike is an exception, having been raised by ponies and actually learning a little empathy from them. He could never relate to another dragon emotionally unless she were raised the same way.
 
You gotta feel sorry for the kid; he’s a loner in just about every sense of the word.

@Itsthinking  
You never know.
 
Maybe his feelings will change over time. Maybe he meets nice dragons or maybe biology just does its job. I like to think of Spike’s crush as a nonsexual one. Loving and lusting after something are two different things, but they can go hand in hand. Maybe as Spike goes into puberty he’ll start lusting after dragonesses, or question his sudden lack of interest in mares. Or maybe he develops a liking for mares in that area too.  
Time could also be a factor. If he has a much slower aging rate than ponies, which seems to be the case, he might just consider moving on to something as long-lived as him.  
On the other hand, it wouldn’t surprise me if by the end of season 4 Rarity gets her wings and extended lifespan as well, so that takes care of that problem, I guess…  
Possibilities, possibilities.

Dragons are pretty much an amalgamation of mammalian and reptilian traits. Their biology changes so much in fiction depending on what the work is about.
 
Honestly? I doubt that Spike would ever want a romantic relationship with a dragon.
 
Oh, and there’s no agreement to what a kirin is, either.

@QueenCold  
What I meant to say, of course, is that dragons have much in common with crocs

@Sjogre  
Dragons do seem to have a lot in common with dragons.  
Crocodiles don’t breathe fire and can’t speak, so maybe their parenting methods differ as well. The only way to know for sure is if they shine any light on it in the show.

@QueenCold  
A kirin, however you want to romanize the name, isn’t a hybrid between a dragon and an equine.
 
That seems to be what a draconequus is, judging by Cheerilee’s description.
 
@Itsthinking  
Assuming that you go by crocodile or alligator behavior, the mother would watch the children for a short time before making them leave.
 
Given that one of the biggest threats to baby alligators is adult males, that seems to be a common factor to them and FiM dragons.

@QueenCold  
Obviously. He’s learned too much about that way of raising from being raised like it himself.

@Itsthinking  
In Spike’s case, he would definitely stick around.

@QueenCold  
Would male dragons stay behind to care for their young? Or are they pretty much just “mate as much as possible and gather a hoard in the mean time to attract more mates?”
 
Regardless, Spike would be different anyway. Doesn’t really matter what dragons or ponies think in this case.

@Sjogre  
Draconequus or kirin/qilin?

@Itsthinking
 
Espionage, eh? You may be onto something.

@lumpfish  
Spike was like a freshman in high school trying to fit in with the upperclassmen.