Sometimes you want to degrade a chick. Be that emotionally, verbally.. or physically. If she's not an absolute Uruk-Hai (or Stacey Abrams
OR Precious), then attractiveness is probably not the deciding factor. It would be the hard limits of the kinds of things she's into being done to her.
If you're depraved enough, I think Sayu's self-esteem is so low that you could do some horrific shit to her.
Pic extremely related.