That's because o11's Pearl is 300% domination material with the intimidation to compliment it. Canon Pearl, despite having well beyond the strength of an average human, would absolutely be the type to sprawl out on the bed and be submissive to one's desires like the good little Pearl she is. Nothing wrong with being into such a women of course, but o11's Pearl is different in the sense that she would absolutely not back down at all.
She's creepy, predatory, and sadistic. She would not rest on the bed waiting for you to pin her down, because inside of her bony little arms is enough strength to snap you into two. She's attractive because her appearance represents exactly who she is, and regardless of how unsightly some may see that, she's not ashamed of it in the slightest. You're a masochist, anon. You want to be beaten down by a lanky sadistic predator that wants to make you beg for her to give you what you want.
You're not attracted to her lanky bony body, but rather what that lanky bony body represents: a degenerate.