Guys: Do you act silly or become nervous/forgetful around an attractive woman?

If so, does it happen around any attractive woman, or does she have to be your "type"? When a manly man tells a woman he's always nervous around her, what does it mean? what does it say about him? that deep inside he's an insecure man..?
Guys: Do you act silly or become nervous/forgetful around an attractive woman?
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