I open his door and instantly regretted it. The scent of cedar was in the air, and he was sitting on his bed, buck-naked, whittling with himself. His head snapped up, and a look of utter shock and embarrassment arrayed itself on his face. So there, Gentle Reader, you have it. I advise you to heed this warning, and do not pry.
People keep their dark secrets for a reason.
You just never know when you might have a roommate made entirely of wood who whittles with himself and wants to keep it private.