Reporting from Bangkok, Thailand — Atjima Khunnok has so many tattoos that she has to count them on her fingers: deities, sacred peaks, parallel rows of ancient Khmer script unfurling across her arms ...

Name a more iconic place for a tattoo than your arm, I’ll wait. There’s a reason arms have been the preferred canvas for both tattoo artists and enthusiasts for decades (dare we say, centuries?). Arms ...