Why women will ask a guy what they should wear/get?

It doesn't even have to be a relationship thing. When I was a kid, my mother would ask me my opinion on what clothing/jewelry she should get while out shopping, I answered her but was thinking "Why are you asking me? I'm a guy." Now I don't mind it as much with my girlfriend, but still find it interesting.

Why women will ask a guy what they should wear/get?
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