Artist’s description:
 
rixie “while somewhat endearing to some, I highly doubt that an oblique canine tooth adds much in the way of beauty.”  
Rainbow “you’re telling me, I can’t wait to get back to normal.”  
Pinkie “COME ON, PARTY POOPERS! WE HAVEN’T EVEN HEARD WHAT JON’S WATCHERS THINK ABOUT THESE NEW ANIME STYLE TEETH! MAYBE THEY THINK WE’RE KAWAII!!”
 
so, don’t really remember the context, but I was talking with gdad greatdragonad greatdragonad about a potential commission. I suggested that he try giving that oblique canine (forgetting what the anime-fan-term for it is) to one of the ponies he has drawn on the regular. He thought it’d be better to get 3 ponies with these fangs and see what people think. Pinkie seems to be on board, at least.