Let's talk beautymarks once again, /a/.
I know it's hard to draw a defined line, but how can you tell when the author's simple and harmless fetish for them has fully digressed into a full-blown morbid obsession? Examples to back your claims are obviously welcomed open-handedly.
holy crap a LA Negima chick that doesn't look like a dog turned inside out and hosed with sulphuric acid?
I DON'T BELIEVE IT.
Ass fetishist is ass fetish.
You got my attention, man. Proceed.