Do women wear underwear(swim shorts) when wearing their swimsuit ?

Do women wear underwear(swim shorts) when wearing their swimsuit?
Do you have swim shorts in your country ?
Just wondering because JAPANESE do have swim shorts to wear under the swimsuit to prevent pubic hair from escaping out the side of the swimming suit/bikini and prevent from transparency of wet swimsuit/bikini showing through the pubic hair. (Japanese ladies tend to be very hairy and dark haired down there)
Is it only a JAPANESE thing ?
I want to know which country are you from as well.
Thank you for answering my question !

In Australia women tend to either wear just their swimsuit or to wear boardshorts over the top, although this is generally if they don't like they're legs or just like th look of the shorts, boardshorts are the type of shorts surfers usually wear which is probably why they're so popular here.
Hope this answers your question

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