Why is "bra" singular, and "panties" plural?!

Question:

Why is "bra" singular, and "panties" plural?

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weird

Answers: that is really weird
I have never thought of that
lol haha ur right! I was gunna say cuz there's 2 legs to fit through but theres 2 boobs also! Haha. I never thought about that. I'm not sure.

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