Korean Drinking Culture

I have always known that the proper Korean way to pour wine for someone is to hold the bottle by the right hand, and support the right elbow with the left hand.

But I only found out why after reading Katy Robinson's A Single Square Picture A Korean Adoptee's Search for Her Roots.

Apparently, in the old days, royal servants did this so the sleeves of their robes would not get in the way.

Separately, a younger person should cover his mouth and turn to the side when he drinks "because Koreans believe it's improper for young people to drink in front of an elder."

The rest about not declining a (or several) drink(s), drinking until one is boisterous or drunk or both, needs no elaboration!