>>50075 (OP)
That's an easy one.
> Extremely smooth and hairless skin in many minds and in it's looks, much smoother than human
> a fucking dragon
> nostalgia
> canonical design is soft and chubby as is, perfect for morphing into extra thicc maternal bodies
> is a pokemon therefore implicit companionship to at least a platonic degree is already canon
Probably more, either way, once a design or character has a bit of headway in arguments that speak for it as source material to create and consume fap material from, it reinforces itself, because people create fanart, based on the fanart, people create fap material, people fap to the fap material, thus associate the source material with that and are more inclined to create more fanart and fap material. I remember one of my first writefaggings that involved a charizard. For several months, I had to make sure nobody had a chance to pick up on the weird boners I had whenever a charizard was to be seen somewhere.