Honestly, the girl is so nonchalant about everything that we're afraid that her heart might stop. Perhaps some day, while being especially blase about gardening in the nude, her whole body will collapse in a big ol' pile of "whatever" and "fuck it, I'm too naked to care."
Obviously we're not wishing this upon her, we just wonder what she cares about. More to the point, is there anyone she would hide her nudity from? Like what if the Pope swings by to see how her dog is doing (because he's a lover of all animals) and he finds Shannan standing in the pool, completely naked, with the dog staring at her boobs? Will she cover up in front of God's right hand man? Or will she wave and say, "Nice hat," because she's too cool to even know who the Pope is?