He wants to know more. Particularly now, when anything would be better than remembering himself; they can talk about Scully, about whatever she became, and how she's adapted, and his own form will fade into the background. He'll forget the shiver of beach grass whenever he turns his head.

(Will he learn a lesson from this discomfort? Probably not as much of one as Scully'd prefer.)

But he can't bring himself to ask for the details, not when it's so clear she's still uncomfortable with the experience. There's no case here, no pressure to deliver information to anyone - only his best friend and a misery she wants to keep private. Mulder brings the mug back up to his mouth. "Well, if you want company this month..."