>>119090809Deviantart has rules that strictly define pornography as something that shows genitals or genital fluids.
As such, bizarre fetish content is everywhere because it can't be policed at all, since according to the rules it's perfectly sfw. It's slightly less prevalent e.g on furaffinity, because FurAffinity has a middle ground rating between Adult and SFW called Mature, kind of like most imageboards have a Questionable rating - so all the fetish stuff goes in there and you gotta enable that shit to even see it.
Guy who draws Kim Possible transforming into a scooter probably also fantasizes about fucking the scooter, but he can't draw that on deviantart. So he draws just the scooter, technically SFW.
End result is that DA is a giant repository of technically SFW fetish art.