Is it rude in Your country to ask a woman her age?

Some westerners say so, but I’m not exactly sure about what’s up in the East, as they have different culture of the West. Many eastern women gave me their ages without me asking.

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Gals and guys, is it also rude in those countries to ask a woman ‘How young are You, m’lady?’
Is it rude in Your country to ask a woman her age?
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