Perhaps you can clear this up

[Mad Mallard]

Basically, some people just need to see tits and a "coucher" to get off on anything, and if they're not there, they'll just add 'em.

Yeah, because not everybody gets aroused by looking at a wash cloth. :p
Frankly, I'm glad when people add their own touch and experience and wants when they do fanart of other people's characters. Sure, some of the work produced is outrageously freaky or a gross misappropriation of the creator's intention, but it's still fun to make and see. We're people, and if people wanna make inappropriate use of anthropomorphic foxes and obsess over weird stuff, fine by me. I'm not saying that's not potentially a problem, but people are going to do what they want to do. And hey, I wouldn't mind seeing people getting back to the roots of this thing either. As long as it's good, whatever it is, I'll welcome it. And for the record, Rena was already an anthromorph before the boobies and fuzzy clam; she just got "hentai-tized" :p