Dwarves live in glorified caves away from sunlight. When they do go out, most of their skin is covered by either heavy clothes or thick hair. My point?
Thorin is pale as fuck. Like, ghostly pale. And he gets sunburns really easily. So, when spending time with Bilbo in the Shire, Bilbo convinced him to wear shire clothes. Thorin is healing from sunburns for the next week or so and can’t comfortably wear his normal clothes.











