A friend pointed out, correctly, that I probably shouldn’t use “cartoon ponies” as  metonymy for “weird sexual fixations that you can acquire via internet culture.”  It’s punchy and cute, but…in fact the MLP fandom, even the sexual side of it, is almost entirely non-paraphilic.  And I knew that.  “We like these particular fictional characters and they feature in our fantasies” is not weird internet sex shit, it’s bog-standard sex shit, and as far as I can tell the actual pony-ness is mostly elided or outright eliminated for these purposes. 

Mea culpa.  The pony fans are dumped on quite enough by the world.