I don’t understand the “expose the collarbone” part

I think elderly women are expected to wear more modest clothing, so by making her wear this, it'll be embarrassing??? Not completely sure tho (づ￣ ³￣)づ

It's because their blood is poisonous. That's why they wear clothes that shows as minimal skin as possible.

That's so smarttt. Idk how to delete my comment, but this makes much more sense (￣∇￣")

You don't need to delete that shkshsksj it's been long so it's understandable to get confused about some detailsss