have noticed my own noticing of Achilles' Tendon area shapes. mildly, 'back here, her feet don't go in like this, they just go straight down. it's like a right angle'. replied by 'she's a dancer!' Is that like what I meant ?
from Delany's Tale of Rumor and Desire
'Behind her, one bare foot was propped on spead toes, the position from which, if he could move close enough, he might best note just what sort of foot she had'
the two ways of lying on the bed either cheeks or heels appear from the hallway in the same spot