I got the feeling her body was stiff. Like when she spread her legs wide or hugged them and opened them up...
I think this model is still appealing because we can see her masturbating.
Her bud and expression after she climaxes are so beautiful it sends shivers down my spine.
During the masturbation scene, I imagined her beautiful sleeping face with her eyes closed, then the expression on her face when she woke up and said "good morning." A beautiful woman's sleeping face is also exciting.
For some reason, full nudity scenes are less exciting.
I found scenes where they're wearing clothes but exposing their butts or vaginas to be erotic. The spread-leg scene in movie 6 is beautiful. A refined pink.