Hell if I know it's probably one of the parts of a woman that I pay the least attention to and I don't pay attention to women's shoes to begin with. Footbros are stupidly unabashed and my friend's wife told us about how a dude she knew from high school is still trying to solicit feet pics from her despite how many times she's blocked him. If the dude ever shows up in person he might just get shot over it.
Like exercise you don't want to just rush in, gotta warm up properly to avoid injury ya know.
Well some do refer to as the "brown eye".