Disclaimer: I don't own csi
Doesn't Understand
Grissom just doesn't understand.
He doesn't understand that Catherine won't be like him. She can't be like hin, she's not wired that way. She can't go days/months/years without any human contact. She can't be content with living in her head. With nothing but dead white authors, equations and bugs keeping her company at night.
She needs to take chances. She needs to take off her latex gloves. She needs to feel someone else's warm flesh against her. She needs to be reminded that there is more to life than death.
But even if she were to explain all this to him she doubts he would understand. And part of her thinks– he doesn't want to understand.
The end