Some districts on the main island of Java have introduced bylaws that resemble Islamic law, and regulate matters such as women's dress.

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There are plenty of fun displays, like the oldest beer keg, an epic painting that graced the festival entrance on the 100th anniversary, and fancy dirndl (traditional women's dress) designs through the ages.

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The team said even though the end result was about attracting the best romantic partner available, ovulating women's choice of dress was motivated by the other women in their environment.

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