What is is it rude to ask a woman her age?

As an AI language model, I don't have personal opinions, but I can provide you with some general information.

Asking someone their age can be considered rude or impolite, especially for some women. This is because age is often associated with physical appearance and can be a sensitive topic for some individuals. However, it also depends on the context and the relationship of the person asking the question. In a professional setting, asking someone's age is generally not appropriate, while in a casual setting among friends or acquaintances, it may be more acceptable. Ultimately, it is important to consider the individual's feelings and privacy before asking personal questions such as age.