There is a simple reason for that though, shoes take space, and the animations are done accordingly to that (e.g. the heels touching the MC's skin).This ruins half the sex scenes for me:
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Foot fetish is in the game. For me, someone who likes specifically bare feet, those scenes where this wardrobe is used is like a scene for a boob guy but she is wearing a bra.
There is no way to delete this outfit, there is no way to select which outfit is used for which sex scenes, there is no way to take off the shoes in this particular outfit.
Simply removing the shoes for animations meant with shoes would leave the feet floating in the air.