Despite cool temps outside, there are still plenty of clothing-optional occasions. Here are my faves:
Summiting/Celebrating (Just Ask Tensing Norgay. Plus, it's warmer here than Everest and the cloud cover is actually a feather duvet)
Pondering your sagging middriff? No, that's for the parents. In this photo, she was clearly just preparing herself for the big climb having reached Base Camp I.