Just another thing to add to the list of references/parodies MLP has made to other works:
mylittlepony
Jizz to these sluts: young and old, white and black, amateur and pro pornstars
mylittlepony
mylittlepony
GoneWildASCII
hardbodies
GoneWildPlus
VintageBabes
Strippersonthejob
hentai
nsfwcosplay
pronebone, NSFW_GIF