\n\t\t\t\t\tnonsequitur that was drawn by \n\t\t\t\t\tSimonAquarius. This was a few years back but if I remember correctly, we didn't really have a story set in stone to explain what was going on. Fluttershy and Rarity are just wearing some very skimpy outfits that are more overtly fantastical in nature - well, they're skimpy by our standards but quite normal to them given the sheer size of their ample curves and private parts. After all, regardless of whether it's an alternate universe or not, in Fuquestria it's not unusual for dickmares to have gargantuan, balloon-like proportions that are impossible to keep modest, and ponies tend to wear very little either way so it's not terribly untrue to the canon either.It could easily be interpreted as taking place in that alternate universe where Chrysalis won (which is what Simon originally seemed to have in mind based on how he drew Fluttershy's outfit) though Non desired more of a generic dress-up in the prompt he gave. So... pick your preference. These might be mere costumes or this may be a real universe where Fluttershy is a skilled monk wielding hir horse penis and quarterstaff while Rarity is a paladin with a monumental mare battering ram and heavy-duty balldrons to guard hir assets from shrinkage. Flutters' class doesn't require as much armor, so shi is free to be as naked as shi likes, while Rarity's armor allows hir to incorporate the weight of hir giant marecock into attacks that give hir extra options in the heat of magical melee battles. Isn't it strange, though? NPCs are one thing but it seems like any pony that chooses the life of an adventurer gradually expands into an excessively-sized titan like this no matter what class they end up in...
Spitballing horny thoughts aside, I personally lean a little towards this being non-canon myself. I feel a little bad that I took so long in posting this because I've been sitting on it forever, but I hope you guys enjoy it nonetheless. Non did some editing when he colored it - filling in missing lines and adjusting details, and redesigning Fluttershy's outfit so that it was more of a generic monk costume rather than her tribal look directly taken from that one alternate-universe bit in the show... and oh yes, increasing Rarity's bust size quite a bit as well, which I'll gladly welcome no matter what. I think both options are kind of fun even if only one is colored, so I provided both to look at - this time around there actually are differences between the line and colorwork to care about! I'm enamored with Fluttershy's proportions regardless, though.
And judging by the scattered smooch marks on hir body I'm not the only one, either. :3