I often like to go bottomless rather than topless, no idea why that feels more comfy, but it does. Maybe it's related to the way I don't like my chest touched unless it's by people I'm comfy with, while anyone can touch my crotch. Lovers, good friends, hobos...

No, the nudity for art/professional reasons makes perfect sense. There's been a couple of people who have replied that have been life models for a start.

As for the comfort zone of travelling, as long as you can face your issues when they come up, rather than running away, you're doing ok.