Well, I knew a woman once who was very mysterious, and I never saw her wearing sunglasses. She didn’t need them; she was mysterious by nature, and her natural mystery played a large part in what made her so compelling. Besides, her eyes were so powerful they would probably have blown the sunglasses off anyway.
So, it seems that some people naturally have it, while others need to wear sunglasses in order to pretend they have it. Wondering over.