It is embarrassing to live your life in the nude.
Doug is a hippie that lives in a mountain cave and panhandles in town to get money for food.
Doug doesn't want to spend a lot of money.
Doug wears some jeans and shirts that he picked up from a thrift store.
Doug doesn't buy clothes because no one is around him in the mountains.
Hikers who see Doug note his not-so-great clothes but otherwise treat him normally.
Hikers occasionally see or meet up with Doug and are freaked out that he travels nude.