●~ChemicOwl's "Canterlot Palace Spires at Night"
●~Chromadancer 's "1,000 Year Slumber"
●~Ironfruit's "Dawn Scene - Full Frame Vector"
●=MoongazePonies's "Angel Bunny", modified to make him look into the horizon.
●*RedPandaPony's "Fluttershy Being Fluttershy" sightly modified (closed the mouth for a more "serene" face, and the tail)
●*BonesWolbach's "Field Clearing", modified by erasing the clouds and some stars.
●~ThatsGrotesque's "Lyra facehoof" and ●~Muffin308's "Bon bon looks surprised" were combined into "Bon Bon Facehoof"
●~Shelmo69's "Lyra", with modified front legs.
Long story short, because she was sitting on a bench like a human in the 7th episode. Since then (in the fandom), she has an obsession with humans, hands, human objects, walking on her hind legs, and has been considered the pony version of and a long list of etceteras.
She is also shipped with Bon Bon, because the same scene, and she (Bon Bon) is usually depicted as being ashamed of Lyra's obsession.
And by the time I made this comic, there was already considered an overused meme, but I was just starting and I said to myself: "why not?"
For more information, you can go to Know Your Meme: knowyourmeme.com/memes/sitting…
Don't forget Pinkie Pie and the 4th wall, Derpy and the muffins, Derpy and Dinky, DJ Pon3/Vinyl Scratch eye's, Pinkie Pie's sisters' names, the infamous "wingboner", drunk Berry Punch, Voice Actor Bon Bon, all the Dr. Whooves ponies, Scootaloo as a chicken, Rarity as a marshmallow, Sweetie Belle as a dictionary...
Since there is so much left unexplained, the fandom will quickly (and happily) try to fill the gaps. If that's good or bad, time will tell.