andyjeffries
Senior Master
Having just got back from Korea, I can confirm that everyone passes things to each other and shakes hands with a supporting hand (sometimes on top instead of underneath). This absolutely is Korean culture. All I can say is rather than ask one gm and one master, visit Korea so you can experience their culture and customs for yourself. This was my first visit and I'm hooked (I posted fuller notes on my visit in another forum, but didn't mention about the handshaking/passing things as so few people dispute that it's normal).