Claude chuckles quietly, trying to avoid any pretense of self-consciousness. It's not the undressing that bothers him, or even the scars themselves - it's the uncomfortable awareness that some of these scars were by Dimitri's own hand, while Dimitri was at his worst, and Claude would really rather him never know about that. "I mean, Fodlan's been at war for a long time now. I think all of us have our scars from that, visible or otherwise."

He drapes his shirt over Dimitri's arm, and then...yes, the pants are getting pushed down. He's wearing underwear, obviously, but how much that spares Dimitri is questionable.