Well, yeah. Just because something already has sexy traits doesn't mean they won't be further sexualized. Just look at the characters that were recently revealed in Pokémon Sun and Moon. They have sexy traits, yet the fans will over empathized those traits in fan-art/porn. It's something that can be seen in all sizeable fandoms, not just FNAF.

I would normally make some comment about "that was fast" or "IT BEGINS", but, you know what..? It actually took longer than I expected.