Are sports a guy's domain?

Is it a turn off when a girl is all into sports? I was talking to a friend of mine and he said he doesn't like it when girls know EVERY single thing about a sport because he wants to be able to teach her something. He said it also makes her seem like one of the guys. He is a dominant male type so I guess he likes his women more feminine?

What do you guys think?
Are sports a guy's domain?
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