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"The hand-kiss originates from proskynesis."

"Yes?"

"An act of reverence toward gods and men. It was a ritual expressing submission by kissing the ground, which then spread from the gesture of kissing a monarch's or clergyman's ring as a sign of loyalty and obedience...."

Lee Yeon-woo lightly waved his gloved hand.

"Eventually it was modified into the form of kissing the back of the hand."

"Oh."

"You could say it's primarily a European custom."

"Oh."

"Still not in the mood for learning, I see."