Right now, Greg has two choices; dressing a naked, unconscious, fully-grown (?) man, all while ignoring his own burns, or carrying said naked dude into the medical tent and having to explain without any answers.

Greg drapes the hoodie around Sans' dead weight to the best of his ability, and that's about as far as his remaining energy can take him, Dad Mode or no. He just can't mess around with skeleton legs and shorts right now. He can't.

And that's the story of how a man covered in light, chafing burns carried the unconscious, half-dressed warden into the medical tent.