How does one hold a wine glass. i see lots of beer bottle holding in movies, but not much wine glass holding.

by the stem? with or without extended pinkie?
by the base? i understood that Moselle glasses had a green base so one would not show finger prints? sure is a lot easier to swirl the wine in the glass by holding the stem.

by the bowl? one hand or two? thought by the bowl was forbidden, then Reidel came out with stemless. only after training from Yoda, can one not grab the bowl on that baby.

i usually grab the bowl on my restaurant served whites to get them warm enough to clear the ice from around the edges.