Yes, that is exactly why "post" people hold their wine glasses by the stem.
Holding a snifter by the body of the glass. When you hold a glass closely like that, allowing heat exchange between the body and the liquid, you are quite obviously warming it up.
With spirits like brandy or whiskey, this has the benefit of really getting the aroma out, which is important to the complex body of the liquor. Using your body temperature to warm it past the limits of room temperature is important.
Meanwhile, wine is pretty much ALWAYS best served below room temperature. Cupping the cup part of the glass with your hand warms it up past that needlessly and takes away from the wine.
Trololo said: Meanwhile, wine is pretty much ALWAYS best served below room temperature. Cupping the cup part of the glass with your hand warms it up past that needlessly and takes away from the wine.
It's ok, yukkuris don't have souls and so their body temperature is always cold like a dead corpse.