How important is a woman's décolletage as a part of her figure?

Like the legs and butt are very important parts that add to a woman's attractiveness, although face is the MOST important. Like that, at what scale do you think is the neck area (especially collarbone) important for the attractiveness of a female? What do you think of it?

I hope I could explain :/
How important is a woman's décolletage as a part of her figure?
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