What does peter do to his clothing that initially shocks anne in the diary of anne frank?

Okay, this guy is actually Peter van Daan. But he's a little bit like Peter Pan—he's mesmerizing, innocent, and more than a little reluctant to grow up.

It's not as though we blame Peter—whose actual name was Peter van Pels—for his immaturity. The situation he finds himself in is so horrific and claustrophobic that it makes sense that he'd prioritize getting through the days instead of bettering himself.