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Since it does not look proper, that's why men are not allowed.
In Italy, men are not allowed to wear skirts in public.
The Declaration • March 4, 2020 • https://thedeclarationatcoloniahigh.com/46816/fun-factofthe-day/a-man-can-be-arrested-in-italy-for-wearing-a-skirt-in-public/
A man can be arrested in Italy for wearing a skirt in public