A man fears a woman who sees him.

Not one who wants, but one who feels. One who reads his anxiety, his insecurity, his mask of strength.
He can play a role, but not with her. She sees where he's weak and doesn't use it against him. That's what's scarier.
He confuses calm with coldness, distance with indifference. And she simply watches, knowing that his desire is a form of defense. When he says "I don't care," he's actually afraid of being exposed.